kaname ishide
1. Key stone; Essential component
Noun
#145302
1. Key stone; Essential component
1. keystone
1. It was a key stone.; It was important.
1. Is not a cornerstone.; Is not essential.
1. Was not a key stone.; Was not important.
1. If it is a key stone; When it is a key stone
1. Probably.; Likely.
1. It is a key stone.; It is important.
1. Key stone; Foundation stone
1. It is not a stepping stone.; It is not important.