dissemble, dissembled, dissembling, dissembles.verbs
transitive verb senses.to disguise or conceal under a false appearance; a hypocrite; to put on the appearance of; simulate; feign; when people dissemble, they hide their real intentions or emotions (he was not slow to dissemble when it served his purposes to separate others; his dissembling enabled him to gain the confidence of the group so that he could begin to divide them, leading to control of them for selfish purposes; the cabal are dissemblers); to hide; to get away from something; 
intransitive verb senses.to put on a false appearance; to disguise or conceal one's real nature, motives or feelings behind a false appearance; conceal facts, intentions or feelings under some pretense; a dissimulator
dissembler.noun,.plural.dissemblers
dissemblance.noun,.plural.dissemblances
dissimulation; duplicity
dissemblingly.adverb

disassemble, disassembled, disassembling, disassembles.verbs
transitive verb use.to take apart (disassemble a toaster)
intransitive verb use.to come apart (the units from IKEA disassemble easily; the spectators began to disassemble)
disassembly.noun,.plural.disassemblies

disseminate, disseminated, disseminating, disseminates.verbs-
transitive verb use.to scatter widely, as in sowing seed; to spread abroad; promulgate (disseminate information); to spread abroad as though sowing seed (disseminate ideas); to disperse. throughout
intransitive verb use.to become diffused; spread
dissemination, disseminator(s).nouns
disseminated.adjective
widely dispersed

dissent.intransitive verb
to withhold assent; to differ in opinion or feeling
difference of opinion or dissenting opinion
dissent, dissented, dissenting, dissents.intransitive verbs
to differ in opinion or feeling; disagree; to withhold assent or approval
dissent.noun,.plural.dissents
difference of opinion or feeling; disagreement; nonconformity
dissentingly.adverb
dissenter.noun,.plural.dissenters
one who dissents (political dissenters)
dissentious.adjective
characterized by dissension or dissent; divisive; factious

dissension.noun,.plural.dissensions
disagreement; contentious-quarreling; discord

dissident.adjective
disagreeing, as in opinion or belief
dissident.noun,.plural.dissidents
one who disagrees; a dissenter

dissidence.noun,.plural.dissidences
disagreement, as of opinion or belief; dissent

dissertate.intransitive verb
to discuss formally

dissertation.noun
a formal or lengthy discussion in speech or writing; an extended usually written treatment of a subject
dissertational.adjective

dissimulation.noun,.plural.dissimulations
dissimulator.noun,.plural.dissimulators
to hide one's feelings by pretense or deception
dissimulate.transitive-and.intransitive verb
not like the real self; not sincere; hypocrisy
dissimulate, dissimulated, dissimulating, dissimulates.verbs
transitive verb senses.to disguise (one's intentions, for example) under a feigned appearance
intransitive verb senses.to conceal one's true feelings or intentions
dissimulative.adjective

dissipate, dissipated, dissipating, dissipates.verbs
transitive verb senses.to break up and drive off (as a crowd); to drive away; disperse; scatter; to cause to spread thin or scatter and gradually vanish (the rain has dissipated); to attenuate to or almost to the point of disappearing (the wind finally dissipated the smoke; to lose (as heat or electricity); irrecoverably; to spend or use up wastefully or foolishly (lifelong tendency to dissipate his gifts in travel and pleasure; his fortune is dissipated in imprudent political adventures) 
intransitive verb senses.to break up and scatter or vanish; to be extravagant or dissolute in the pursuit of pleasure; especially; to drink to excess
dissipater.noun,.plural.dissipaters
also spelt.dissipator.noun,.plural.dissipators
dissipation.noun,.plural.dissipations
the act of dissipating or the condition of having been dissipated; wasteful expenditure or consumption; dissolute.indulgence in sensual pleasure; intemperance
dissipative.adjective

dissolution.noun,.plural.dissolutions
a dissolving or being dissolved; breaking up into parts; an ending; termination; decomposition into fragments or parts; disintegration

dissolute.adjective
lacking moral restraint; indulging in sensual pleasures or vices
dissolutely.adverb
dissoluteness.noun,.plural.dissolutenesses

dissonance.noun,.plural.dissonances
a harsh, disagreeable combination of sounds; discord; lack of agreement, consistency or harmony; conflict; a combination of musical tones conventionally considered to suggest unrelieved tension and require resolution

dissonant.adjective
harsh and inharmonious in sound; discordant.adjective
being at variance; disagreeing
dissonantly.adverb
Music:.constituting or producing a dissonance

dissuade, dissuaded, dissuading, dissuades.transitive verb
to deter an individual from a course of action or a purpose by persuasion
dissuader.noun,.plural.dissuaders
dissuasion.noun,.plural.dissuasions
the act or an instance of dissuading
dissuasive.adjective
dissuasively.adverb
dissuasiveness.noun,.plural.dissuasivenesses
synonyms.deter, discourage

distemper.noun,.plural.distempers
a disordered or abnormal bodily state especially of quadruped mammals; as a highly contagious virus disease especially of dogs marked by fever, leukopenia and respiratory, gastrointestinal and neurological symptoms

distend, distended, distending, distends.verbs
to expand from internal pressure; to extend; dilate

distinct.adjective
clearly marked off; not alike; not average; separate; individual; discrete
distinction.noun,.plural.distinction
distinctness.noun,.plural.distinctnesses
distinctly.adverb

distinctive.adjective
serving to identify; distinguishing.(distinctive tattoos); characteristic or typical.(Calgary has a distinctive western flavor); distinctive indicates.qualities distinguishing and uncommon and often superior or praiseworthy (a distinctive aura.{atmosphere} of grace and elegance); differentiating between or among things different, peculiar
distinctively.adverb
distinctiveness.noun,.plural.distinctivenesses

distinction.noun,.plural.distinctions
the act of distinguishing; differentiation; the condition or fact of being dissimilar or distinct; difference; a distinguishing factor, attribute or characteristic; excellence or eminence, as of performance, character or reputation

distinguish, distinguished, distinguishing, distinguishes.transitive verbs
to distinguish is to show how something is different; to make noticeable or different; to separate or mark off by differences, set apart; differentiate; to perceive as being different or distinct; to perceive distinctly; discern-(distinguished the masts of ships on the horizon); to cause oneself to be eminent or recognized (they have distinguished themselves as dedicated social workers; he was distinguished for his corruptness, as was ancient king Ahaz)
distinguishably.adverb
intransitive senses-to perceive or indicate differences; discriminate.(distinguish between comfort and discomfort)
distinguished-adjective
noticeable as eminent; celebrated
distinguishable.adjective
that can be distinguished

distort, distorted, distorting, distorts.transitive verbs
to alter the normal aspect of; contort (to twist.facts in such a way as to provide.undeserving.credit (example); to alter or distort the true meaning of; to twist out of shape; change the appearance of; misrepresent; misshape; misstate; pervert
distortion.noun,.plural.distortions
distorter.noun,.plural.distorters

divulge, divulged, divulging, divulges-transitive verbs
to make known something private or secret; reveal
divulgence, divulger.noun

digit.noun,.plural.digits
one of the ten Arabic numerical symbols 1, 2, 3, 4, 5, 6, 7, 8, 9, or 0; a human finger or toe

digital.adjective
of, relating to or resembling a digit, especially a finger; operated or done with the fingers (a digital switch); having digits; expressed in digits, especially for use by a computer; using or giving a reading in digits (a digital readout on a clock)
digital.noun
a key played with the finger, as on a piano
digitally.adverb
Computers:.a computer that performs calculations and logical operations with quantities represented as digits, usually in the binary number system; compare analog

debility.noun,.plural.debilities
the state of being weak or feeble; infirmity; from Middle English 'debilite' and from Old French from Latin 'debilitas' which is from 'debilis' meaning 'weak'
debilitate, debilitated, debilitating, debilitates.transitive verbs
to sap the strength or energy of; enervate
debilitative.adjective
debilitation.noun,.plural.debilitations

desist, desisted, desisting, desists.intransitive verbs
to cease doing something; forbear; stop; to bring to a standstill; abandon; abolish; abort; abrogate; annul; cancel; cut; drop; eliminate; end; halt; quash; quit; scratch; scrub; shutdown; suspend; terminate; call off

droll.adjective.comparative.and.superlative forms.droller; drollest
having an odd and amusing quality (a droll little man with a peculiar sense of humor, a book of droll stories)

dwindle, dwindled, dwindling, dwindles.verbs
intransitive verb use.to become gradually less until little remains
transitive verb use.to cause to dwindle; decrease

demented.adjective
mentally ill; insane; suffering from dementia
dementedly.adverb
dementedness.noun
dement, demented, dementing, dements.transitive verbs
to make insane
dementia.noun
deterioration of intellectual faculties, such as memory, concentration and judgment, resulting from a disease or a disorder of the brain; it is often accompanied by emotional disturbance and personality changes; madness; insanity
demential.adjective

dementia praecox.noun.called also schizophrenia