Mud
late Middle English: probably from Middle Low German mudde .
wiktionary
From Middle English mud, mudde, mode, probably a borrowing from Middle Dutch mod, modde or Middle Low German mudde, ultimately from Proto-Germanic *mud-, *mudra-(“mud”), perhaps from Proto-Indo-European *mū-, *mew-(“moist”). Cognate with Saterland Frisian Mudde(“mud”), Middle High German mot(“mud”), Swedish modd(“slush”). Compare also suffixed variants West Frisian modder(“mud”), Dutch modder(“mud”), German Low German Mudder(“mud”), German Moder(“moldiness, mildew, decay”).
Alternative etymology suggests the Proto-Germanic word is possibly borrowed from a Uralic language (compare e.g. Finnish muta(“mud”), Northern Sami mođđi(“mud”), from Proto-Uralic *muďa). [1]
From MUD.
etymonline
mud (n.)
late 14c., mudde, "moist, soft earth," cognate with and probably from Middle Low German mudde, Middle Dutch modde "thick mud," from Proto-Germanic *mud- from PIE *(s)meu-/*mu- [Buck], found in many words denoting "wet" or "dirty" (source also of Greek mydos "damp, moisture," Old Irish muad "cloud," Polish muł "slime," Sanskrit mutra- "urine," Avestan muthra- "excrement, filth"); related to German Schmutz "dirt," which also is used for "mud" in roads, etc., to avoid dreck, which originally meant "excrement." Welsh mwd is from English. The older word is fen.
Meaning "lowest or worst of anything" is from 1580s. As a word for "coffee," it is hobo slang from 1925; as a word for "opium" from 1922. Mud-puppy "salamander" is by 1855, American English; the mud-dauber wasp was so called by 1856. The children's mud-pie is attested from 1788. Mud-flat "muddy, low-lying ground near a shore" is by 1779. Mud-room "room for removing wet or muddy footwear" is by 1938.
The expression clear as mud (that is, "not clear at all") is by 1796. To throw or hurl mud "make disgraceful accusations" is from 1762. To say (one's) name is mud and mean "(one) is discredited" is recorded from 1823, from mud in obsolete sense of "a stupid twaddling fellow" (1708). Mud in your eye as a toast is recorded from 1912, American English.
