errant
/ˈɛɹənt/
noun
Meaning
A knight-errant.
adjective
Meaning
Straying from the proper course or standard, or outside established limits.
Wandering; roving around.
Prone to making errors; misbehaved.
"We ran down the street in pursuit of the errant dog."
Utter, complete (negative); arrant.
Synonyms