English Reference
adjective · verb

muddy

adj. · v.
US /ˈmədi/ UK /mˈʌdi/ mud·dy UK spelling muddies

  1. 01 A2 Elementary

    adj.covered or splashed with wet soil.

    adj.covered, splashed, or filled with mud; containing sediment in suspension.

    Simple

    The children came inside with muddy boots after playing in the garden.

    In context

    The hikers struggled to maintain their footing on the muddy trail after three days of torrential rain had turned the path into a swamp.

    dirtygrimymucky
  2. 02 B2 Upper Intermediate

    adj.not clear or bright, like a dark colour or a confusing sound.

    adj.lacking clarity or brightness; used of colours that are dull or sounds that are muffled.

    Simple

    The recording was old and had a muddy sound that made it hard to hear the singer.

    In context

    The artist's decision to mix too many pigments resulted in a muddy brown that lacked the vibrancy of the original sketch.

  3. 03 B2 Upper Intermediate

    v.to cover something with mud or make a liquid cloudy.

    v.to soil with mud or to make a liquid turbid by stirring up sediment. Transitive use.

    Simple

    The passing car splashed through a puddle and muddied my clean trousers.

    In context

    Heavy cattle traffic had muddied the stream to the point where the water was no longer suitable for the camp's filtration system.

  4. 04 B2 Upper Intermediate

    v.to make a situation or an idea more confusing and less clear.

    v.to make a matter, argument, or situation more complicated or less clear; often used in the phrase 'muddy the waters'.

    Simple

    Adding more rules now will only muddy the situation for the new staff.

    In context

    The lawyer's constant interruptions seemed designed to muddy the waters and distract the jury from the primary evidence.

Usage muddied the waters

Image caption, The Daily Telegraph's front page shows muddy flood waters washing away a bridge.

BBC News· 26 Aug 2026

But muddying the waters is the mix of harms and benefits that make up the social media experience.

Smithsonian Magazine· 17 Aug 2026

Etymology 1

The adjective is derived from Late Middle English muddi, moddy, muddy (“covered with or full of mud, muddy”), from mud, mudde (“mud; turbid water”) + -i (suffix forming adjectives). Mud, mudde is possibly borrowed from Middle Dutch modde, and/or Middle Low German modde, mudde, from Proto-Germanic mud-, mudra- (“mud”), possibly from Proto-Indo-European mū-, mew- (“moist”). The English word is analysable as mud + -y (suffix meaning ‘having the quality of’ forming adjectives). Doublet of muddle. The verb is derived from the adjective. cognates * Middle Low German moddich, muddich (German Low German muddig (“muddy; mouldy”))

Etymology 2

From mud (crab) + -y (diminutive suffix).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin ine-pro *mū-
Level B2 · Upper Intermediate
Frequency Frequent
Updated