Etymology
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advert (v.)
mid-15c., averten "to turn (something) aside" (the mind, the attention, etc.), from Old French avertir (later advertir) "to turn, direct; turn aside; make aware, inform" (12c.), from Latin advertere "turn toward, turn to," from ad "toward" (see ad-) + vertere "to turn" (see versus). The -d- was restored in English 16c. Especially in speaking or writing, "turn to (a topic) abruptly and plainly" (18c.). Related: Adverted; adverting.
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advert (n.)
"paid public notice," by 1860, colloquial shortening of advertisement, from the print abbreviation, which is attested by 1855.
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advertise (v.)

early 15c., advertisen, "to take notice of" (a sense now obsolete), from Old French advertiss-, present-participle stem of advertir (earlier avertir) "make aware, call attention, remark; turn, turn to" (12c.), from Latin advertere "to direct one's attention to; give heed," literally "to turn toward," from ad "to, toward" (see ad-) + vertere "to turn" (see versus).

The transitive sense of "give notice to others, inform, warn; make clear or manifest" (mid-15c.) is by influence of advertisement; the specific commercial meaning "call attention to goods for sale, rewards, etc." emerged by late 18c. Compare advert (v.) "turn (someone's) attention to."  Related: Advertised; advertising.

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