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speech; expression; wording; language
彼の言葉遣いはとても丁寧ですね。
His way of speaking is very polite.
子供の言葉遣いが最近とても気になります。
I'm worried about my child's language.
面接では言葉遣いに十分注意すべきだ。
You should be very careful about your choice of words in interviews.