甘くない (not easy, not to be taken lightly)
idiom1 sentence
Literally 'not sweet', used idiomatically for 'not going to be easy', 'not so simple', 'not to be taken lightly'. Standard metaphorical use.
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1 sentence
Literally 'not sweet', used idiomatically for 'not going to be easy', 'not so simple', 'not to be taken lightly'. Standard metaphorical use.