| Term | Definition |
| Counterfeit | Made to resemble something else |
| Countervail | To offset |
| Covert | Concealed, especially for an evil purpose |
| Cower | To crouch down tremblingly, as though through fear or shame |
| Crass | Coarse or thick in nature or structure, as opposed to thin or fine |
| Credulous | Easily deceived |
| Cupidity | Avarice |
| Cursory | Rapid and superficial |
| Curtail | To cut off or cut short |
| Cynosure | That to which general attention or attention is directed |
| Dearth | Scarcity, as of something customary, essential or desirable |
| Defer | To delay or put off to some other time |
| Deign | To deem worthy of notice or account |
| Deleterious | Hurtful, morally or physically |
| Delineate | To represent by sketch or diagram |
| Deluge | To overwhelm with a flood of water |
| Demagogoue | An unprincipled politician |
| Denizen | Inhabitant |
| Denouement | That part of a play or story in which the mystery is explained |
| Deplete | To reduce or lessen, as by use, exhaustion or waste |
| Deposition | Testimony legally taken on interrogatories and reduced to writing, for use as evidence in a court |
| Deprave | To render bad, especially morally bad |
| Deprecate | To express disapproval of or regret for, with hope for the opposite |
| Deride | To ridicule |
| Derision | Ridicule |
| Derivative | Coming or acquired from some origin |
| Descry | To discern |
| Desiccant | Any remedy which, when applied externally, dries up or absorbs moisture, as that from wounds |
| Desuetude | A state of disuse or inactivity |
| Desultory | Not connected to what precedes |
| Deter | To frighten away |
| Dexterity | Readiness, precision, efficiency, and ease in any physical activity or in any mechanical work |
| Diaphanous | Transparent |
| Diatribe | A bitter or malicious criticism |
| Didactic | Pertaining to teaching |
| Diffidence | Self-distrust |
| Diffident | Affected or possessed with self-distrust |
| Dilate | To enarge in all directions |
| Dilatory | Tending to cause delay |
| Disallow | To withold permission or sanction |
| Discomfit | To put to confusion |
| Disconcert | To disturb the composure of |
| Disconsolate | Hopelessly said; also, saddening, cheerless |
| Discountenance | To look upon with disfavor |
| Discredit | To injure the reputation of |
| Discreet | Judicious |
| Disheveled | Disordered, disorderly or untidy |
| Dissemble | To hide by pretending to be something different |
| Disseminate | To sow or scatter abroad, as seed is sown |
| Dissent | Disagreement |
| Dissolution | A breaking up of a union of persons |
| Distraught | Bewildered |
| Divulge | To tell or make known as something previously private or secret |
| Dogmatic | Making statements without argument or evidence |
| Dormant | Being in a state of or resembling sleep |
| Dubious | Doubtful |
| Duplicity | Double-dealing |
| Earthenware | Anything made of clay and baked in a kiln or dried in the sun |
| Ebullient | Showing enthusiasm or exhiliration of feeling |
| Edacious | Given to eating |
| Edible | Suitable to be eaten |
| Educe | To draw out |
| Effete | Exhausted, as having performed its functions |
| Efficacy | The power to produce an intended effect a shown in the production of it |
| Effrontery | Unblushing impudence |
| Effulgence | Splendor |
| Egregious | Extreme |
| Egress | Any place of exit |
| Elegy | Lyric poem lamenting the dead |
| Elicit | To educe or extract gradually or without violence |
| Elucidate | To bring out more clearly the facts concerning |
| Emaciate | To waste away in flesh |
| Embellish | To make beautiful or elegant by adding attractive or ornamental features |
| Embezzle | To misappropriate secretly |
| Emblazon | To set forth publicly or in glowing terms |