FRUS'TRATE, verb transitive [Latin frustro.] 1. Literally, to break or interrupt; hence, to defeat; to disappoint; to balk; to bring to nothing; as, to frustrate a plan, design or attempt; to frustrate the will or purpose. 2. To disappoint; applied to persons. 3. To make null; to nullify; to render of no effect; as, to frustrate a conveyance or deed. FRUS'TRATE, part. adjective Vain; ineffectual; useless; unprofitable; null; void; of no effect.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI