Be necessary
Know and be necessary are semantically related. In some cases you can use "Know" instead a verb phrase "Be necessary".
Know
Know verb - To have a practical understanding of.
Be necessary and know are semantically related. Sometimes you can use "Be necessary" instead a verb "Know".
Both terms in one sentence
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If this happens, you know the seemingly minor action will be necessary to avoid a roadblock later on.
Source: Video Game / Radiant Historia - Meanwhile, the cinematic that shows how your task force ended up in its exact situation explained a lot more of the plot than would be necessary for someone about to drop into a war zone and who would theoretically know at least basic history.
Source: Opening Monologue
Cite this Source
Know and Be necessary. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/be_necessary/know
Be necessary & Know. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/be_necessary/know>.
Know or Be necessary. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/be_necessary/know.
Google Ngram Viewer shows how "be necessary" and "know" have occurred on timeline