ぬるい・温いnurui[2]nakadaka (mid-high)

1. i-adjectivelukewarm; tepid
   このコーヒーはぬるいです。↗

   This coffee is not hot enough.
2. i-adjectivelenientusu. written as 緩い

• Synonym生ぬるいなまぬるいCasualColloquial. Lukewarm in an unpleasant way; also covers attitudes or responses that are half-hearted and not thorough, as in 「生ぬるい対応」.
• Synonym生暖かいなまあたたかいCasualColloquial. Describes air or wind that is only half-warm, often with an unsettling, creepy edge, as in 「生暖かい風」.
• Related暖かいあたたかいNeutralNeutral. Warm in a pleasant, comfortable way — a positive feel. 「ぬるい」 instead means the temperature falls short: not warm enough, or not cold enough.
• Antonym冷たいつめたいNeutralNeutral. The opposite of 「ぬるい」: cold to the touch, as in 「冷たいビール」.
• Antonym熱いあついNeutralNeutral. The opposite of 「ぬるい」: hot to the touch, as in 「熱いお茶」.

Use 「ぬるい」 for a temperature that is neither hot nor cold — not warm enough, or not cold enough when it should be. Pick 「生ぬるい」 or 「生暖かい」 when the tepidness feels unpleasant, 「暖かい」 for comfortably warm. 「冷たい」 and 「熱い」 are opposites.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 熱ねつが足たりない。なまあたたかい。
2. 徹底てっていしていない、中途半端ちゅうとはんぱな。