verbs
contract
"flex a muscle"
is a type of (narrower)
become smaller or draw together
"The fabric shrank"; "The balloon shrank"
exhibit the strength of
"The victorious army flexes its invincibility"
is a type of (narrower)
display proudly; act ostentatiously or pretentiously
"he showed off his new sports car"
form a curve
"The stick does not bend"
bend a joint
"flex your wrists"; "bend your knees"
cause (a plastic object) to assume a crooked or angular form
"bend the rod"; "twist the dough into a braid"; "the strong man could turn an iron bar"