What is the difference between 使 and 遣?
What is the difference between 使 and 遣? I understand 言葉を使う, but how is it different from 遣い in 言葉遣い?

Question

What is the difference between 使 and 遣?
What is the difference between 使 and 遣? I understand 言葉を使う, but how is it different from  遣い in 言葉遣い?

Answer

つかう　を　Windows　で変換すると、下のように出てきます。

使う
〔一般的〕「機械を使う、人を使う、お金を使う、頭を使う、横目を使う．」

遣う
〔限定的〕〈気・心を〉、工夫して使用．⇒使う．「気を遣う（＝使）う、人形を遣（＝使）う．」