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advance [advance 词源字典]: advance: [13] Advance originated in the Latin adverb abante ‘before’ (source of, among others, French avant and Italian avanti), which in turn was based on ab ‘from’ and ante ‘before’. In post-classical times a verb, *abantiāre, seems to have been formed from the adverb. It developed into Old French avancer, and passed into English as avaunce, initially with the meaning ‘promote’.

A new form, advancer, started life in Old French, on the mistaken association of avancer with other av- words, such as aventure, which really did derive from Latin words with the ad- prefix; over the 15th and 16th centuries this gradually established itself in English. The noun advance did not appear until the 17th century.
[advance etymology, advance origin, 英语词源]
advance (v.): mid-13c., avauncen, transitive, "improve (something), further the development of," from Old French avancier "move forward" (12c.), from Vulgar Latin *abanteare (source of Italian avanzare, Spanish avanzar), from Late Latin abante "from before," composed of ab- "from" (see ab-) + ante "before, in front of, against" (see ante).

The -d- was inserted 16c. on mistaken notion that initial a- was from Latin ad-. From c. 1300 as "to promote;" intransitive sense is mid-14c., "move forward." Meaning "to give money before it is legally due" is first attested 1670s. Related: Advanced; advancing. The adjective (in advance warning, etc.) is recorded from 1843.
advance (n.): c. 1300, "boasting, ostentation," from advance (v.). Early 15c. as "advancement in rank, wealth, etc." Advances "amorous overtures" is from 1706.
advanced (adj.): 1530s, "far ahead in the course of actions or ideas," past participle adjective from advance (v.). Of studies, from 1790. Military use is from 1795. In late 19c. used especially in reference to views on women's equality.
advancement (n.): c. 1300, avauncement, "a raising to a higher rank," from Old French avancement "advancement, profit, advance payment," from avancer (see advance (v.)). Of money, from 1640s.
connivance (n.): the main modern form of connivence (q.v.).
contrivance (n.): 1620s, from contrive + -ance.
grievance (n.): c. 1300, "state of being aggrieved," from Old French grevance "harm, injury, misfortune; trouble, suffering, agony, sorrow," from grever "to harm, to burden, be harmful to" (see grief). In reference to a cause of such a condition, from late 15c.
irrelevance (n.): 1735, from irrelevant + -ance. Earlier in the same sense was irrelevancy (1590s).
observance (n.): early 13c., "act performed in accordance with prescribed usage," especially a religious or ceremonial one, from Old French observance, osservance "observance, discipline," or directly from Latin observantia "act of keeping customs, attention, respect, regard, reverence," from observantem (nominative observans), present participle of observare (see observe). Observance is the attending to and carrying out of a duty or rule. Observation is watching, noticing.
relevance (n.): 1733; see relevant + -ance. Related: Relevancy (1560s).