silly

US /ˈsɪl.i/
UK /ˈsɪl.i/
"silly" picture
1.

ばかな, 愚かな, くだらない

having or showing a lack of common sense or judgment; absurd and foolish.

:
Don't be silly, of course I love you.
ばかなこと言わないで、もちろん愛してるよ。
It was a silly mistake to make.
それはばかな間違いだった。