expression, godan verb (-su)
offer a cup of sake
Used when someone pours sake into a cup and presents it to another person, often in a formal or hospitable context.
彼は来客に杯を差した。
He offered a cup of sake to the guest.
Compound of 杯 (sakazuki, 'sake cup') + を + 差す (sasu, 'to offer, to hold out').