BEFOULED
befouled, fouled
(adjective) made dirty or foul; “a building befouled with soot”; “breathing air fouled and darkened with factory soot”
Source: WordNet® 3.1
Verb
befouled
simple past tense and past participle of befoul
Source: Wiktionary
BEFOUL
Be*foul", v. t. [imp. & p. p. Befouled; p. pr. & vb. n. Befouling.]
Etym: [Cf. AS. bef; pref. be- + f to foul. See Foul, a.]
1. To make foul; to soil.
2. To entangle or run against so as to impede motion.
Source: Webster’s Unabridged Dictionary 1913 Edition