From Middle English myry, equivalent to mire + -y.
miry (comparative mirier, superlative miriest)
- Relating to a mire; swampy, boggy. [from 14th c.]
- 1596, Edmund Spenser, The Faerie Queene, V.10:
- Only these marishes and myrie bogs, / In which the fearefull ewftes do build their bowres, / Yeeld me an hostry mongst the croking frogs […].
- 1908, Kenneth Grahame, The Wind in the Willows:
- summer was long over, and cold and frost and miry ways kept them much indoors […].