使用方式

gay(?!(?<=megay)acht)

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请参阅regex proof。

说明

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  gay                      'gay'
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  (?!                      look ahead to see if there is not:
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    (?<=                     look behind to see if there is:
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      megay                    'megay'
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    )                        end of look-behind
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    acht                     'acht'
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  )                        end of look-ahead

型

您可以排除匹配的megayacht并匹配包含gay的单词

\b(?!megayacht\b)\w*gay\w*

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regex demo

您可以使用交替模式：

(?<!me)gay|gay(?!acht)

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