noun
Literary or formal term for both hands, often used in poetic or descriptive contexts. In everyday speech, 両手 (りょうて) is more common.
彼は双の手を広げて夕日を浴びた。
He spread both hands and basked in the evening sun.
The standard, everyday word for 'both hands'. 双の手 is more literary and less common.
Compound of 双 (そう, 'pair') + の (possessive particle) + 手 (て, 'hand'). The exact historical derivation is uncertain, but the structure is transparent.