1. defile, maculate, stain, sully, tarnish

make dirty or spotty, as by exposure to air; also used metaphorically

Example Sentences:
'The silver was tarnished by the long exposure to the air'
'Her reputation was sullied after the affair with a married man'

• defile
• stain
• sully
• tarnish

2. befoul, defile, foul, maculate

spot, stain, or pollute

Example Sentences:
'The townspeople defiled the river by emptying raw sewage into it'

• befoul
• defile
• foul

3. defiled, maculate

morally blemished; stained or impure

• defiled

4. maculate

spotted or blotched

• dirty
• soiled
• unclean