Etymology
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exploit (n.)

late 14c., "outcome of an action," from Old French esploit "a carrying out; achievement, result; gain, advantage" (12c., Modern French exploit), a very common word, used in senses of "action, deed, profit, achievement," from Latin explicitum "a thing settled, ended, or displayed," noun use of neuter of explicitus, past participle of explicare "unfold, unroll, disentangle," from ex "out" (see ex-) + plicare "to fold" (from PIE root *plek- "to plait").

Meaning "feat, achievement" is c. 1400. Sense evolution is from "unfolding" to "bringing out" to "having advantage" to "achievement." Related: Exploits.

exploit (v.)

c. 1400, espleiten, esploiten "to accomplish, achieve, fulfill," from Old French esploitier, espleiter "carry out, perform, accomplish," from esploit (see exploit (n.)). The sense of "use selfishly" first recorded 1838, from a sense development in French perhaps from use of the word with reference to mines, etc. (compare exploitation). Related: Exploited; exploiting.

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Definitions of exploit
1
exploit (v.)
use or manipulate to one's advantage;
He exploit the new taxation system
Synonyms: work
exploit (v.)
draw from; make good use of;
we must exploit the resources we are given wisely
Synonyms: tap
exploit (v.)
work excessively hard;
he is exploiting the students
Synonyms: overwork
2
exploit (n.)
a notable achievement;
Synonyms: feat / effort
From wordnet.princeton.edu