Second-person singular simple present form of exact(verb)
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Use "exactest" in a sentence
"Moreover, (2) before some audiences not even the possession of the exactest knowledge will make it easy for what we say to produce conviction."
"I warrant, since thou exactest such profound respect to yonder tender piece of frailty, whose every motion, step, and look bespeaks her very woman, less than absolute adoration must not be yielded to her of the dark tresses and nobly speaking eye."
"Furthermore the ascendant of this our day is, according to the exactest science of computation, the planet Mars; and it so happeneth that Mercury is in conjunction with him, denoting an auspicious moment for hair cutting; and this also maketh manifest to me that thou desires union with a certain person and that your intercourse will not be propitious."