expression
dexterous feat; speed and precision of a trained hand
Refers to a skillful, quick movement or technique performed by someone with practiced hands, often in contexts like martial arts, crafts, or magic tricks.
熟練の職人の手練の早業に、見物客は息をのんだ。
The onlookers gasped at the dexterous feat of the skilled craftsman.
A compound of 手練 (shuren, 'skill, dexterity') + の (no, possessive particle) + 早業 (hayawaza, 'quick work, fast technique'). The exact historical origin is uncertain, but it is a set phrase describing masterful, swift handiwork.