Yeah, same. English is not my primary language, so...
mars, verb
Third-person singular simple present indicative form of mar.
mar, transitive verb
To inflict damage, especially disfiguring damage, on.
To impair the soundness, perfection, or integrity of; spoil.
To make defective; to do injury to, esp. by cutting off or defacing a part; to impair; to disfigure; to deface.