訓 お(す) ・ 音 スイ
Sino-Vietnamese: suy
The hand radical 扌 plus 隹 for sound: pushing forward with the hand, then pushing thought forward. Sino-Vietnamese suy, as in suy luận (reasoning).
Stroke data: KanjiVG (CC BY-SA 3.0) — kanjivg.tagaini.net
犯人の年齢を推定する。 (はんにんのねんれいをすいていする)
We estimate the culprit's age.