General:
* decline
* defeat
* defense
* demand
* depart
* describe
* design
* determine
* develop
More specific:
* deactivate
* decompose
* decrease
* deduct
* deface
* defraud
* dehydrate
* delicious
* deliver
* demoralize
* denominator
* departure
* depress
* derive
* destroy
* detail
* determine
* develop
* devote
* degree
* depend
Prefixes with "de":
* de- (remove or reverse): "de"activate, "de"compose, "de"crease
* des- (down or away): "de"scent, "de"scend, "de"scribe
* dem- (people or population): "de"mocracy, "de"mography
Note: This is not an exhaustive list, and there are many more words that start with the prefix "de". The meaning of the prefix can vary depending on the word, but it generally indicates removal, reversal, or reduction.