Etymology: Shortened < advertisement n. Compare earlier ad n.³ and advt. n.

Etymology: Partly (i) < Anglo-Norman and Middle French avertir, also advertir (French avertir ) to become aware of, realize (late 12th cent. in Old French, used reflexively), to take note of, observe, heed (1180), to turn one's attention (to), to take notice, pay attention (13th cent.), to inform, notify (c1285 in Anglo-Norman; this sense is not paralleled in continental French until later: beginning of the 15th cent.) < an unattested post-classical Latin form *advertire , alteration (with change of conjugation) of classical Latin advertere to turn or direct towards, to direct (the senses) towards, to pay attention, to notice, to remark, ascertain, to attract the attention of, (with animum ) to direct the mind (towards), to pay attention (to), to notice, observe < ad- ad- prefix + vertere to turn (see vert v.¹); and partly (ii) directly < classical Latin advertere (see above). Compare Old Occitan avertir (second half of the 12th cent.), Catalan advertir (15th cent.), Spanish advertir (1256 as †abertir ), Portuguese advertir (1562), Italian avvertire (a1342; 1282 as †avertare ). Compare advertise v., originally a doublet of this word (deriving from the French extended stem), and compare also animadvert v.The French reflexes of the two classical Latin verbs advertere and āvertere (see avert v.) were formally identical, due to regular phonological developments in Old French. From the 14th cent. onwards, the French verb meaning ‘to turn towards, to notice, etc.’ was frequently spelt advertir after its Latin etymon; this form remained in use until the early 18th cent. (the 1718 edition of the French Academy dictionary still records the form with medial -d- as an alternative spelling). The occasional English β. forms are after Middle French avertir.