What does 暖める mean?
暖める is a Japanese verb meaning “to warm (up to someone/something), to heat (up to someone/something)” in English. It can also be translated as “to sit on (an idea, plan, etc.), to renew (an old friendship), to take for oneself” depending on context. It is written as 暖める in kanji, あたためる in hiragana, and atatameru in romaji. This word is part of JLPT N3 vocabulary.