What Does The Root Word Flex Mean - How to use flex in a sentence. Mentally or spiritually pliant, from old french flexible or directly from latin. Web early 15c., capable of being bent; As, to flex the arm 2. Web the meaning of flex is to bend especially repeatedly.
Web the meaning of flex is to bend especially repeatedly. As, to flex the arm 2. How to use flex in a sentence. Web early 15c., capable of being bent; Mentally or spiritually pliant, from old french flexible or directly from latin.