Definition of いたさ
- (v1, vi) to be (of animate objects); to exist
民主主義に対する信頼をなくした者もいる。
Some have lost faith in democracy. - to stay
おかげで元気にしております。
They're all fine, thank you. - (v1, aux-v) (after the -te form of a verb) verb indicating continuing action or state (i.e. to be ..ing, to have been ..ing)
すっかり食べ終わってはいない。
I haven't quite finished eating.