Antiseptic

wiktionary

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From anti- +‎ septic.

etymonline

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antiseptic (adj.)

also anti-septic, "inimical to micro-organisms which cause disease, putrefaction, etc.," 1750, from anti- "against" + septic "pertaining to putrefaction." Figurative use by 1820. As a noun meaning "an antiseptic substance" by 1803.