1. unimportant
Whether the problem is important or unimportant, you must solve it.
His opinion was unimportant.
I thought the message was unimportant so I didn't tell you.
Editors often go to extremes in providing their readers with unimportant facts.
英語 "という言葉insignificant"(unimportant)集合で発生します。
Advanced 3 (Just for the Health of It!)