| A | B |
| deciduous | falling off as of leaves |
| decimate | kill, usually one out of ten |
| decipher | interpret secret code |
| declivity | downward sloppe |
| decollete | having a low-necked dress |
| decomposition | decay |
| decoy | lure or bait |
| decrepit | worn out by age |
| decrepitude | state of collapse caused by illness or old age |
| decry | express strong disapproval of; disparage |
| deducible | derived by reasoning |
| deface | mar; disfigure |
| defame | harm someone's reputation; malign; slander |
| default | failure to act |
| defeatist | attitude of one who is ready to accept defeat as a natural outcome |
| defection | desertion |
| defer | delay till later; exempt temporarily |
| defer | give in respectfully; submit |
| defiance | courteous regard for another's wish |
| defiance | refusal to yield; resistance |
| defile | pollute; profane |
| definitive | final; complete |
| deflect | turn aside |
| defoliate | destroy leaves |
| defray | pay the costs of |
| deft | neat; skillful |
| defunct | dead; no longer in use or existence |
| defuse | remove the fuse of a bomb; reduce or eliminate a threat |
| degenerate | become worse; deteriorate |
| deify | turn into a god; idolize |
| deign | condescend; stoop |
| delectable | delicious; delightful |
| delete | erase; strike out |
| deliberate | consider; ponder |
| delirium | mental disorder marked by confusion |
| delude | deceive |
| deluge | flood; rush |
| delusion | false belief; hallucination |
| delve | dig; investigate |
| demagogue | person who appeals to people's prejudice; false leader of people |
| demean | degrade; humiliate |
| demeanor | behavior; bearing |
| demented | insane |
| demise | death |
| demolition | destruction |
| demoniac | fiendish |
| demur | object( because of doubts, scruples); hesitate |
| demure | grave; serious; coy |
| demystify | clarify; free from mystery or obscurity |
| denigrate | bloackerd |
| denizen | inhabitant or resident; regular visitor |
| denotation | meaning; distinguishing by name |
| denouement | outcome; final development of the plot of a play |
| depict | portray |
| deplete | reduce; exhaust |
| deploy | spread out (troops) in an extended though shallow battle line |
| deposition | testimony under oath |
| depreciate | lessen in value |
| depredation | plundering |
| derange | make insane; disarrange |
| derelict | abandoned; negligent |
| dermatologist | physician who studies the skin and its diseases |