Part of speech: Verb
contract
Example: flex a muscle
Categories: Shrink, Contract
Part of speech: Verb
exhibit the strength of
Example: The victorious army flexes its invincibility
Categories: Flaunt, Flash, Show off, Ostentate, Swank
Part of speech: Verb
bend a joint
Example: flex your wrists; bend your knees
Categories: Move
Part of speech: Verb
cause (a plastic object) to assume a crooked or angular form
Example: bend the rod; twist the dough into a braid; the strong man could turn an iron bar
Categories: Change shape, Change form, Deform
Flex, Bend, Twist, Deform, Turn
The word "flex" was borrowed from Latin flexus.
Legal and medical professions still use Latin phrases because of its precision and historical authority.