Flex, as biceps (4)
I believe the answer is:
bend
(Other definitions for bend that I've seen before include "Stoop; knot" , "Lean forward" , "Crook" , "Curve; knot" , "Turn - buckle" .)
I believe the answer is:
bend
(Other definitions for bend that I've seen before include "Stoop; knot" , "Lean forward" , "Crook" , "Curve; knot" , "Turn - buckle" .)