silly

Inspiring scornful pity.

“how silly an ardent and unsuccessful wooer can be especially if he is getting on in years”

Lacking seriousness; given to frivolity.

“silly giggles”

Ludicrous, foolish.

“a silly idea”

Dazed from or as if from repeated blows.

“knocked silly by the impact”

A word used for misbehaving children.

“don't be a silly”