Antonyms

Deposition means the process of accumulation of sediment. Its opposite is the process of eroding.

To deride means to ridicule, to insult. Its opposite among the choices is to show respect for.

To desiccate means to dehydrate, to remove water from. Its opposite is to add water to.

Derelict means a social outcast, a tramp. Its opposite among the choices is a pillar of society.

The opposite of  desiccate is to drench.

The opposite of to desiccate among the choices is to hydrate.

Desultory means aimless, without goal or method. Its opposite is strictly methodical.

Desuetude means disuse, no longer in use. Its opposite is use.

Detumescent means lessening of a swelling. Its opposite is swollen. 

Diatribe means violent criticism. Its opposite is encomium.

Deterioration means reduction in quality or value. Its opposite is improvement.

The opposite of diatribe is eulogy.

The opposite of diatribe is complimentary description.

The opposite of to dilute is to concentrate.

The opposite of din is silence.