Open English Wordnet
Nouns
(n)flexthe act of flexing“he gave his biceps a flex to impress the ladies” Verbs
(v)flexcontract“flex a muscle” (v)flexexhibit the strength of“The victorious army flexes its invincibility” (v)bend, flexform a curve“The stick does not bend” (v)flex, bendbend a joint“flex your wrists”,
“bend your knees” (v)flex, bend, deform, twist, turncause (an 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”