Shirabe
旧交 を 温める
English jmdict
1
expressions (phrasesIchidan verb to renew old friendship
どうやら、１年ブランクを取り戻し、旧交を温めることができたみたいだな。
It looks like we've been able to fill in that one year gap and renew our old friendship.

温めるあたためる

Common Ichidan Transitive
English jmdict
1
Ichidan verbtransitive verb to warm (up);to heat (up)
ミルクを温めてくれませんか。
Will you warm the milk, please?
2
Ichidan verbtransitive verb only applies to 温める to sit on (an idea, plan, etc.);to keep to oneself;to nurse;to mull over
3
Ichidan verbtransitive verb only applies to 温める to renew (an old friendship)
See also: 旧交を温める (きゅうこうをあたためる)
4
Ichidan verbtransitive verb only applies to 温める to take for oneself
Other forms 暖める 【あたためる】

温めるぬるめる

Ichidan Transitive
English jmdict
1
Ichidan verbtransitive verb word usually written using kana alone to cool (water) down;to make less hot (e.g. by adding cold water)
Other forms 微温める 【ぬるめる】 (rarely used kanji form)