訓 いと ・ 音 シ
Sino-Vietnamese: mịch, ti
The character pictures a twisted skein of silk. It is the thread radical mịch; in Japanese it also stands for 絲 ti, as in ti trù (silk).
Stroke data: KanjiVG (CC BY-SA 3.0) — kanjivg.tagaini.net
針に糸を通す。 (はりにいとをとおす)
I thread the needle.