experienced; practiced; familiar — having become used to something so that one acts skillfully or comfortably
彼は慣れた手つきで包丁を扱い、あっという間に野菜を切った。
He handled the knife with practiced ease and chopped the vegetables in no time.
新しい仕事にももう慣れたので、ミスが減った。
I've already gotten used to the new job, so my mistakes have decreased.
慣れた道なら暗くても一人で帰れる。
If it's a familiar route, I can go home alone even in the dark.