Definitions:

1. cover (a surface) by smearing (a substance) over it verb
   • smear the wall with paint

Synonyms:

• asperse
• besmirch
• blot
• blur
• calumniate
• cytologic smear
• cytosmear
• daub
• defame
• denigrate
• malignment
• slander
• smirch
• smudge
• smutch
• stain
• sully