What is the correct kanji for the verb to sweat 汗をかく

Question

What is the character used for the verb to sweat? 汗をかく

Answer 1

The kanji is 掻. Let me describe how you can check.

When you type the expression in with your IME, often a dictionary with appear with usage information. On my system, when I type かく, to the side a window with details on 掻く, 書く, 描く, and 搔く appears. For 掻く it says: （頭・あぐら・汗・いびき・裏・寝首・恥・べそを）⇒かく　＊掻く：常用外 ＊簡易慣用字体

Note arrow suggesting that it be written in hiragana. Also note the * which indicates that it is not included in basic kanji, and hence is not typically written in kanji.

Also, the dictionary is often useful. Quote:

か・く【×掻く】

② 涙や汗などをからだの外に出す。「寝汗を―・く」「べそを―・く」

Note the × before the headword. This indicates that it is not generally written in kanji. Same details as above.