In a sentence
In dim light the pupils dilate to let in more illumination.
Synonyms
widenexpandenlarge
Antonyms
Keep going
See all More GRE words starting with D
dabble
to engage in something superficially or as a casual pastime
dais
a raised platform for speakers or honored guests
dally
to waste time or act without urgency
dampen
to make something slightly wet, or to make a feeling or reaction less strong
dappled
marked with spots or patches of color or light
daunt
to intimidate or discourage with fear or doubt
dawdle
to move slowly or waste time idly
dearth
a scarcity or shortage of something
Learn words the way the GRE tests them.
Vocabulary sticks when you meet it in real sentences. Practise these words inside text completion and sentence equivalence questions.