erring (adj.)
straying, wandering, drifting
AYL III.ii.126 [Celia as Aliena reading] how brief the life of man / Runs his erring pilgrimage
Ham I.i.155 [Horatio to Marcellus and Barnardo] Th'extravagant and erring spirit hies / To his confine
Oth I.iii.350 [Iago to Roderigo, of Othello's marriage to Desdemona] a frail vow betwixt an erring barbarian and a super-subtle Venetian