New answers tagged adjectives
〜くない (casual) 〜くありません (formal) It's basically that simple. So saying 寒くありません is more formal than saying 寒くない. However, I feel that saying 寒くありません is a bit stiff even if you are trying to be polite. Instead, saying 寒くないです sounds more natural and is also more polite than leaving off the です.
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