sessle,v.dial. Also sissle. intr. To move uneasily, fidget. 1695Kennett Par. Antiq.Gloss.s.v.Cart-Sadel, In Kent to sessle about is to change seats very often.1865Garland Words W. Cornw. in Jrnl.Roy.Inst.Cornw. Apr. 52 Sissling, moving uneasily in sleep.