プログレッシブ和英中辞典(第4版)の解説
なれ【慣れ】
experience
慣れとは恐ろしい
Beware of overconfidence.／Don't trust to experience too much.
慣れでもう彼の異様な姿には驚かない
I have learned not to be surprised by his strange appearance.／I'm so used to it that his strange appearance no longer surprises me.