i-adjective

boring

tsumaranai

meaning: is boring

state

feeling

examples

この映画えいが途中とちゅうでつまらなくなった。

kono eiga, tochuu de tsumaranaku natta.

This film got boring partway through. casual

はなしながくて、すこしつまらなかったです。

hanashi ga nagakute, sukoshi tsumaranakatta desu.

The talk went on and on, and it was a little dull. neutral