けんいし
Archaic
Meanings
Archaic
Noun
1. keystone
Pitch accent
んいし
Composed of
sword (esp. a large, double-edged one); blade; bayonet; swordsmanship; stinger; ovipositor
stone; jewel; precious stone; flint (in a lighter); stone (in go); stone (in the bladder, kidney etc.); calculus