errant

to be wandering; not sticking to a circumscribed path

Unlike his peers, who spent their hours studying in the library, Matthew preferred errant walks through the university campus.

Never shoot at anything without a clearly apparent backstop to contain errant rounds.

Time and again, his footwork was a mess, resulting in errant throws on his only series before he gave way to backup Kurt Warner.

Note that you can build your GRE vocabulary via Vocab Assistant app hosted in facebook messenger.