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affect [affect 词源字典]: affect: There are two distinct verbs affect in English: ‘simulate insincerely’ [15] and ‘have an effect on’ [17]; but both come ultimately from the same source, Latin afficere. Of compound origin, from the prefix ad- ‘to’ and facere ‘do’, this had a wide range of meanings. One set, in reflexive use, was ‘apply oneself to something’, and a new verb, affectāre, was formed from its past participle affectus, meaning ‘aspire or pretend to have’.

Either directly or via French affecter, this was borrowed into English, and is now most commonly encountered in the past participle adjective affected and the derived noun affectation. Another meaning of afficere was ‘influence’, and this first entered English in the 13th century by way of its derived noun affectiō, meaning ‘a particular, usually unfavourable disposition’ – hence affection.

The verb itself was a much later borrowing, again either through French or directly from the Latin past participle affectus.
=> fact[affect etymology, affect origin, 英语词源]
dilemma: dilemma: [16] Dilemma was originally a technical term in rhetoric, denoting a form of argument in which one’s opponent is faced with a choice of two unfavourable alternatives. It comes via Latin dilemma from Greek dilēmma, a compound formed from di- ‘two’ and lēmma ‘proposition, premise’. (Lēmma itself, which English acquired in the 16th century, came ultimately from *lab-, the base of Greek lambánein ‘talk’.) The ‘looser’ general sense ‘choice between unpleasant alternatives’ developed in the late 16th century.
left: left: [13] The Old English word for ‘left’ was winestra. Etymologically this meant ‘friendlier’ (it is related to Swedish vän ‘friend’), and its euphemistic application to ‘left’ is a reminder that historically the left-hand side of the body has been superstitiously regarded as of ill omen. To call it ‘friendly’ (a usage which survives in Swedish vänster and Danish venstre ‘left’) was an attempt to placate the evil forces of the left. (Latin sinister ‘left’ is similarly fraught with negative connotations.

It too had euphemistic origins – it came from a source meaning ‘more useful’ – and it developed the figurative senses ‘unfavourable’, ‘injurious’, etc, taken over and extended by English in sinister [15].) An ancestor of left existed in Old English – left or *lyft. But it meant ‘weak’ or ‘foolish’, and it was not until the 13th century that it came to be used as the partner of right.

Its ultimate origins are not known.
unfavorable (adj.): also unfavourable, mid-15c. (implied in unfavorably), from un- (1) "not" + favorable (adj.).
"We must not indulge in unfavorable views of mankind, since by doing it we make bad men believe that they are no worse than others, and we teach the good that they are good in vain." [Walter Savage Landor, "Imaginary Conversations"]
animadverter: "A person who animadverts; a censurer, fault-finder; an unfavourable critic or commentator", Mid 17th cent.; earliest use found in John Milton (1608–1674), poet and polemicist. From animadvert + -er.
polylemma: "†( Logic ) a complex syllogism which involves more than two alternatives ( obsolete ); (also more generally) a situation in which a difficult choice has to be made between more than two unfavourable alternatives", Mid 19th cent.; earliest use found in William S. Hamilton (1788–1856), philosopher.