silly

Having or exhibiting a lack of good judgment or common sense; foolish. synonym: foolish.

Lacking seriousness or responsibleness; frivolous.

Semiconscious; dazed.

Happy; fortunate; blessed.

Plain; simple; rustic; rude.

Simple-hearted; guileless; ingenuous; innocent.

Weak; impotent; helpless; frail.

Foolish, as a term of pity; deficient in understanding; weak-minded; witless; simple.

Foolish, as an epithet of contempt; characterized by weakness or folly; manifesting want of judgment or common sense; stupid or unwise: as, a silly coxcomb; a silly book; silly conduct.

Fatuous; imbecile; mentally weak to the verge of idiocy.