muddy

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Full of or covered with mud.
• adjective Not bright or pure.
• adjective Not clear; cloudy, as with sediment.
• adjective Lacking luster; dull.
• adjective Confused or vague.
• transitive verb To make dirty or muddy.
• transitive verb To make dull or cloudy.
• transitive verb To make obscure or confused.

from The Century Dictionary.

• To soil with mud; dirty.
• To cloud; make dull or heavy.
• Abounding in, covered with, or containing mud; foul with mud; turbid, as water or other fluids; miry.
• Consisting of mud or earth; hence, gross; impure; vile.
• Not clear or pure in color: as, a muddy green; a muddy complexion.
• Cloudy in mind; confused; dull; heavy; stupid.
• Obscure; wanting in clearness or perspicuity: as, a muddy style of writing.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Abounding in mud; besmeared or dashed with mud
• adjective Turbid with mud.
• adjective Consisting of mud or earth; gross; impure.
• adjective Confused, as if turbid with mud; cloudy in mind; dull; stupid; also, immethodical; incoherent; vague.
• adjective Not clear or bright.
• transitive verb To soil with mud; to dirty; to render turbid.
• transitive verb To cloud; to make dull or heavy; to confuse.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Covered with or full of mud or wet soil.
• adjective With mud or other sediment brought into suspension, turbid.
• adjective Not clear; mixed up or blurry.
• adjective euphemistic Soiled with feces.
• verb transitive To get mud on (something).
• verb transitive To make a mess of, or create confusion with regard to.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective (of color) discolored by impurities; not bright and clear
• adjective (of soil) soft and watery
• verb make turbid
• adjective dirty and messy; covered with mud or muck
• adjective (of liquids) clouded as with sediment
• verb dirty with mud
• verb cause to become muddy