つまはじきでわありませんでした
爪弾きではありませんでした
tsumahajikidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of つまはじき

1. Was not plucked.; Was not played (on a stringed instrument).

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana