Related words 良い is the standard, neutral Japanese word for 'good', while グッド is a casual, Western-flavored loanword mainly seen in slogans, product names, and trendy speech.
いい is the everyday colloquial form of 良い used in ordinary conversation, whereas グッド sounds more modern and marketing-oriented.
グッド is an English-derived casual way to say “good” (e.g. in exclamations), whereas ボン specifically evokes French bon and is much less common.
グッド is a more formal or emphatic loanword often seen in set phrases like グッドタイミング , whereas グー is looser slang for approval.
Written forms グッド Usage 94%
Standard katakana spelling of the English loanword 'good'.
グット Usage 6%
irregular kana usage
Irregular kana variant; it has irregular kana usage. Learners should use グッド .
Etymology Borrowed from English 'good'. The irregular kana form グット is a variant spelling.
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