sinu (Old English) comes from Proto-West Germanic sinu, from Proto-Germanic senawō, from Proto-Indo-European snḗh₁wr̥, from Proto-Indo-European (s)neh₁- — to spin (thread), to sew.
sinu (Old English): sinew, nerve, tendon
Definitions
sinew, nerve, tendon
Ancestry of “sinu”, step by step
sinu traces back through two separate lines of ancestry.