1 : TENDON; especially : one dressed for use as a cord or thread
2 obsolete : NERVE
3 a : solid resilient strength : POWER b : the chief supporting force : MAINSTAY – usually used in plural
Pronunciation: ‘sin-(")yu _also _‘si-(")nu
Etymology: Middle English _sinewe, _from Old English _seono; _akin to Old High German _senawa _sinew, Sanskrit _syati _he binds
Date: before 12th century
Scary tidbit: Amanda’s little 8 year old brother BJ used this in a story he wrote for school.