filthy

From Middle English filthy, filthi, equivalent to filth +‎ -y.

• IPA^(key): /ˈfɪlθi/

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filthy (comparative filthier, superlative filthiest)

1. Covered with filth; very dirty.
2. Obscene or offensive.
   • 1987, Michael Grumley, Final Diary

     Filthy smirking Pat Robertson has come in second in the Iowa Republican caucuses.

3. Very unpleasant or disagreeable.

• (covered with filth): sleazy, slimy, grimy, horry
• (obscene): gruesome, smutty

• (covered with filth): pristine
• (obscene): holy, venerable

filthy (third-person singular simple present filthies, present participle filthying, simple past and past participle filthied)

1. (transitive) To make very dirty; to cover in filth.
   • 2007, Tom Bissell, Chasing the Sea: Lost Among the Ghosts of Empire in Central Asia

     In the years following World War Two, Americans cut down vast forests, built thousands of factories, assembled millions of atmospherically toxic automobiles, and filthied the water throughout North America.

   • 2009, Jeffery Deaver, Hell's Kitchen

     He shouldered his way inside, filthying his T-shirt on the charred wood.