All-important and Certain

Opposite meaning words

All-important adjective - Impossible to do without.

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Certain is an antonym for all-important in urgently important topic.

Certain adjective - Known but not named.

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All-important is an antonym for certain.

Nearby Words: certainty, certainly

One can not help but suspect that the name of the Celestial Intervention Agency from Doctor Who, which frequently flouts the all-important law of non-interference, is not unintentionally reminiscent of a certain terrestrial organization.

Source: Fun With Acronyms / Live-Action TV
Enforced Method Acting: The ending of the first "Dynasty Maker" arc involved the main character's player being kept in the dark as to a... certain all-important detail.

Source: Roleplay / Cerberus Daily News

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Certain and All-important. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/all-important/certain

All-important & Certain. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/all-important/certain>.

Certain or All-important. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/all-important/certain.