To Become Accustomed To, To Get Used To
intransitive verb, ichidan verb
Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means accustomed so the verb vocab version is to become accustomed.
なれる
What have you become accustomed to? All the Narwhals (な) you hang out with. They take some getting used to.
あいつは気の代わりやすい女だけど、もう慣れたよ。
She is a capricious woman, but I’ve gotten used to it.
新しい環境にはもう慣れましたか。
Have you already gotten accustomed to the new environment?
裾上げをお願いできますか？自分ではあまり縫い物に慣れてなくて。
Could you bring the hem up for me? I’m not really used to sewing.