訓 しる(す) ・ 音 キ
Sino-Vietnamese: ký
言 (speech) for meaning, 己 (self) for sound: setting words down so you can find them again. To write down, to record.
Stroke data: KanjiVG (CC BY-SA 3.0) — kanjivg.tagaini.net
毎日日記を書きます。 (まいにちにっきをかきます)
I write in my diary every day.