asserted; asserting; asserts
Definition of assert
1a
: to state or declare positively and often forcefully or aggressively
The suspect continued to assert his innocence.
b
: to compel or demand acceptance or recognition of (something, such as one's authority)
… the confrontations that inevitably occur [between orangutans] when several males try to assert dominance … — NationalGeographic.com Wallace asserted control early—shutting down both candidates when they tried to talk over one another, and shushing the audience when it reacted too audibly.— Glenn Thrush
assert oneself
1
: to speak or act in a manner that compels recognition especially of one's rights
… she wants him to learn to assert himself with people in positions of authority.— Malcolm Gladwell … a long-suffering Irish community asserted itself by putting its own politicians in power.— Ellis Cose
2
: to become more strongly apparent : to become clearly seen, known, or experienced
Unbidden, a glint asserts itself in Ms. Brown's eyes …— Joanne Kaufman … a passion that through its long suppression was now asserting itself with volcanic necessity.— Zadie Smith
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Merriam-Webster unabridged
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Time Traveler for assert
The first known use of assert was circa 1604
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