also: へつぽつ · へつふつ
adverb taking the 'to' particle, taru-adjective
rocking from side to side (of a boat)
Literary or archaic adverb describing the swaying motion of a boat. Often used with と (to) or in a たる (taru) adjective form.
小舟が波に揺られて丿乀と揺れた。
The small boat rocked from side to side in the waves.