Word Origin & History
repelc.1421, "to drive away, remove," from O.Fr. repeller, from L. repellere "to drive back," from re- "back" + pellere "to drive, strike" (see pulse (1)). Meaning "to affect (a person) with distaste or aversion" is from 1817. Repellent (adj.) is recorded from 1643, from L. repellentem, prp. of repellere;
originally of medicines (that reduced tumors); meaning "distasteful, disagreeable" first recorded 1797. The noun sense of "substance that repels insects" first recorded 1908.