To make uneven.
"The strong wind made the sand dunes look very uneven."
not even or uniform as e.g. in shape or texture
"an uneven color"
"uneven ground"
"uneven margins"
"wood with an uneven grain"
(of a contest or contestants) not fairly matched as opponents
"vaudeville...waged an uneven battle against the church"
Not even
"The uneven surface of the floor made it difficult to walk without tripping."