Flex (?), v. t. [imp. & p. p. Flexed (?); p. pr. & vb. n. Flexing.] [L. flexus, p.p. of flectere to bend, perh. flectere and akin to falx sickle, E. falchion. Cf. Flinch.]
To bend; as, to flex the arm.
© Webster 1913.
Flex, n.
Flax.
[Obs.]
Chaucer.
© Webster 1913.