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to be foolish; to be stupid; to be ridiculous
馬鹿げた提案だと思った。
I thought it was a ridiculous proposal.
馬鹿げているとわかっていてもやった。
I did it even though I knew it was foolish.
こんなに馬鹿げた規則は見直すべきだ。
Such a ridiculous rule should be reviewed.