assistant (adj.)

mid-15c., "helpful, of assistance," from Latin assistentem (nominative assistens), present participle of assistere "stand by, attend" (see assist (v.)). The spelling changed in French then (16c.) in English.

assistant (n.)

mid-15c., assistent "one who helps or aids another," from Latin assistentem (nominative assistens), noun use of present participle of assistere "stand by, attend" (see assist (v.)). The spelling changed in French then (16c.) in English.

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