smirch
Concise Oxford English Dictionary © 2008 Oxford University Press:
smirch /sməːtʃ/
▶verb
- 1 make dirty.
- 2 discredit; taint.
- 1 a dirty mark or stain.
- 2 a flaw.
– origin C15: prob. symbolic.
'smirch' also found in these Oxford entries:

