staleness
🇺🇸
/ˈsteɪlnəs/
🇬🇧
/ˈsteɪlnəs/
not fresh, with a bad taste or smell
The staleness of the milk made it undrinkable.
牛乳の古さがそれを飲めなくさせた。
something that is boring because it has been done or said too many times
The meeting's staleness was relieved by a sudden burst of laughter.
会議のマンネリ感は突然の笑い声で和らげられた。