con·vince
kən-ˈvin(t)s
convinced; convincing
1
: to bring (as by argument) to belief, consent, or a course of action : persuade
… convinced himself that she was all right …—
William Faulkner
something I could never convince him to read—
John Lahr
3
obsolete
: demonstrate, prove
convincer
noun
con·vinc·er
kən-ˈvin(t)-sər
plural -s
: one that convinces
specifically
: a particular act or argument that brings conviction
the offer of $15 was the convincer
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Merriam-Webster unabridged



