Effect and Impetus

Opposite meaning words

Effect noun - A condition or occurrence traceable to a cause.

Usage example: better health is always one of the effects of improved hygiene

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Impetus is an antonym for effect.

Impetus noun - Something that arouses action or activity.

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Effect is an antonym for impetus.

similar	similar effect	similar impetus
original	original effect	original impetus
single	single effect	single impetus
obvious	obvious effect	obvious impetus
Other adjectives: actual, great, main, major, extra, significant, different, added.

This has its intended effect, and after the fight, one of Yusuke's teammates rebukes him for needing the impetus and not fighting full-out in the first place.

Source: Heroic Second Wind
TV series seems to fit here: the impetus for the series is some strange effect which disabled all electronic devices on Earth, and the efforts of the protagonists to reverse it.

Source: Mohs / One Big Lie
As well as providing impetus and material for The Black Dahlia Ellroy wrote an autobiographical account of the effect it had on him in My Dark Places.

Source: Creator / James Ellroy

Cite this Source

Impetus and Effect. (2016). Retrieved 2026, August 09, from https://thesaurus.plus/related/effect/impetus

Effect & Impetus. N.p., 2016. Web. 09 Aug. 2026. <https://thesaurus.plus/related/effect/impetus>.

Impetus or Effect. 2016. Accessed August 09, 2026. https://thesaurus.plus/related/effect/impetus.

Google Ngram Viewer shows how "effect" and "impetus" have occurred on timeline