ken'i shi
1. keystone
Noun
1. keystone
1. Not kenshoku.; Not stone.
1. It is not a sword stone.; It is not a stone sword.
1. If/when the sword-stone…; If the sword-stone exists…
1. Probably a sword-stone.; Likely a sword-shaped rock.
1. If/when it were a sword-stone.; If/when it was a sword-stone.
1. It's not Kenishi.; It isn't Kenishi.
1. It is not a sword stone.; It is not a stone sword.
1. Of sword stone; Sword-stone
1. It was Tsurugiishi.