S: (v) flex (exhibit the strength of) "The victorious army flexes its invincibility"
S: (v) bend, flex (form a curve) "The stick does not bend"
S: (v) flex, bend (bend a joint) "flex your wrists"; "bend your knees"
S: (v) flex, bend, deform, twist, turn (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"