silly
adjective
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dazed from or as if from repeated blows“knocked silly by the impact”punch-drunk
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inspiring scornful pity“The wooer seemed especially silly since they were getting on in years.”patheticridiculous
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lacking seriousnessairheadeddizzyempty-headedfeatherbrainedgiddylight-headedlightheaded
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ludicrous, foolishsappywackywhackycockamamiecockamamygoofy
noun
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a word used for misbehaving children“don't be a silly”