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effect (n.)

mid-14c., "execution or completion (of an act)," from Old French efet (13c., Modern French effet) "result, execution, completion, ending," from Latin effectus "accomplishment, performance," from past participle stem of efficere "work out, accomplish," from assimilated form of ex "out" (see ex-) + combining form of facere "to make, to do" (from PIE root *dhe- "to set, put"). From French, borrowed into Dutch, German, Scandinavian.

From late 14c. as "power or capacity to produce an intended result; efficacy, effectiveness," and in astrology, "operation or action (of a heavenly body) on human affairs; influence." Also "that which follows from something else; a consequence, a result." From early 15c. as "intended result, purpose, object, intent." Also formerly with a sense of "reality, fact," hence in effect (late 14c.), originally "in fact, actually, really." Meaning "impression produced on the beholder" is from 1736. Sense in stage effect, sound effect, etc. first recorded 1881.

Origin and meaning of effect

effect (v.)

"to produce as a result; to bring to a desired end," 1580s, from Latin effectus, past participle of efficere "work out, accomplish" (see effect (n.)). Related: Effecting; effection; effectible.

Origin and meaning of effect

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Definitions of effect from WordNet
1
effect (n.)
a phenomenon that follows and is caused by some previous phenomenon;
the magnetic effect was greater when the rod was lengthwise
effect (n.)
an outward appearance;
she retained that bold effect in her reproductions of the original painting
Synonyms: impression
effect (n.)
an impression (especially one that is artificial or contrived);
he just did it for effect
effect (n.)
the central meaning or theme of a speech or literary work;
Synonyms: essence / burden / core / gist
effect (n.)
(of a law) having legal validity;
the law is still in effect
Synonyms: force
effect (n.)
a symptom caused by an illness or a drug;
the effect of the anesthetic
the effects of sleep loss
2
effect (v.)
produce;
Synonyms: effectuate / set up
effect (v.)
act so as to bring into existence;
effect a change
From wordnet.princeton.edu