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affect1

[v. uh-fekt; n. af-ekt] /v. əˈfɛkt; n. ˈæf ɛkt/
verb (used with object)
1.
to act on; produce an effect or change in:
Cold weather affected the crops.
2.
to impress the mind or move the feelings of:
The music affected him deeply.
3.
(of pain, disease, etc.) to attack or lay hold of.
noun
4.
Psychology. feeling or emotion.
5.
Psychiatry. an expressed or observed emotional response:
Restricted, flat, or blunted affect may be a symptom of mental illness, especially schizophrenia.
6.
Obsolete, affection; passion; sensation; inclination; inward disposition or feeling.
Origin
1350-1400
1350-1400; Middle English < Latin affectus acted upon, subjected to; mental or emotional state (past participle and action noun of afficere), equivalent to af- af- + fec- (combining form of facere to make, do) + -tus action noun suffix or -tus past participle suffix
Related forms
affectable, adjective
affectability, noun
Synonyms
1. influence, sway; modify, alter. 2. touch, stir.
Usage note
Affect1 and effect, each both noun and verb, share the sense of “influence,” and because of their similarity in pronunciation are sometimes confused in writing. As a verb affect1 means “to act on” or “to move” (His words affected the crowd so deeply that many wept); affect2 means “to pretend” or “to assume” (new students affecting a nonchalance they didn't feel). The verb effect means “to bring about, accomplish”: Her administration effected radical changes. The noun effect means “result, consequence”: the serious effects of the oil spill. The noun affect1 pronounced with the stress on the first syllable, is a technical term in psychology and psychiatry. Affect2 is not used as a noun.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for affectability

affect1

verb (transitive) (əˈfɛkt)
1.
to act upon or influence, esp in an adverse way: damp affected the sparking plugs
2.
to move or disturb emotionally or mentally: her death affected him greatly
3.
(of pain, disease, etc) to attack
noun (ˈæfɛkt; əˈfɛkt)
4.
(psychol) the emotion associated with an idea or set of ideas See also affection
Word Origin
C17: from Latin affectus, past participle of afficere to act upon, from ad- to + facere to do

affect2

/əˈfɛkt/
verb (mainly transitive)
1.
to put on an appearance or show of; make a pretence of: to affect ignorance
2.
to imitate or assume, esp pretentiously: to affect an accent
3.
to have or use by preference: she always affects funereal clothing
4.
to adopt the character, manner, etc, of: he was always affecting the politician
5.
(of plants or animals) to live or grow in: penguins affect an arctic climate
6.
to incline naturally or habitually towards: falling drops of liquid affect roundness
Word Origin
C15: from Latin affectāre to strive after, pretend to have; related to afficere to affect1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for affectability

affect

n.

late 14c., "mental state," from Latin noun use of affectus "furnished, supplied, endowed," figuratively "disposed, constituted, inclined," past participle of afficere "to do; treat, use, manage, handle; act on; have influence on, do something to," a verb of broad meaning, from ad- "to" (see ad-) + facere (past participle factus) "do" (see factitious). Perhaps obsolete except in psychology. Related: Affects.

v.

"to make an impression on," 1630s; earlier "to attack" (c.1600), "act upon, infect" (early 15c.), from affect (n.). Related: Affected; affecting.

"to make a pretense of," 1660s, earlier "to assume the character of (someone)" (1590s); originally in English "to aim at, aspire to, desire" (early 15c.), from Middle French affecter (15c.), from Latin affectare "to strive after, aim at," frequentative of afficere (past participle affectus) "to do something to, act on" (see affect (n.)). Related: Affected; affecting.

Online Etymology Dictionary, © 2010 Douglas Harper
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affectability in Medicine

affect af·fect (ə-fěkt')
v. af·fect·ed, af·fect·ing, af·fects

  1. To have an influence on or affect a change in.

  2. To attack or infect, as a disease.

n. (āf'ěkt')
  1. A feeling or emotion as distinguished from thought, or action.

  2. A strong feeling with active consequences.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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