four-fold
- s having four units or components
- s four times as great or many
fouled
- v hit a foul ball
- v make impure
- v become or cause to become obstructed
- v commit a foul; break the rules
- v spot, stain, or pollute
- v make unclean
- v become soiled and dirty
- s made dirty or foul
a building befouled with soot
breathing air fouled and darkened with factory soot - s especially of a ship's lines etc