訓 つつし(む) ・ 音 キン
Sino-Vietnamese: cẩn
Speech 言 gives the meaning and 堇 gives the sound: being careful with one's words. Sino-Vietnamese cẩn as in cẩn thận (careful).
Stroke data: KanjiVG (CC BY-SA 3.0) — kanjivg.tagaini.net
謹んでお悔やみ申し上げます。 (つつしんでおくやみもうしあげます)
Please accept my deepest condolences.