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to laugh at; to ridicule; to mock; to make fun of; to sneer at
彼の失敗を嘲笑うのは良くないことです。
It's not good to laugh at his failure.
観衆は失敗した彼を嘲笑った。
The audience mocked him when he failed.
何人かが彼女の発表を嘲笑っている。
Some people are mocking her presentation.