From Wiktionary, the free dictionary
From mì-mhaise (“deformity, unseemliness, unhandsomeness”) + -eil (adjectival suffix).
mì-mhaiseil
- deformed
- unhandsome, uncomely, unseemly
- Edward Dwelly (1911) “mì-mhaiseil”, in Faclair Gàidhlig gu Beurla le Dealbhan [The Illustrated Gaelic–English Dictionary][1], 10th edition, Edinburgh: Birlinn Limited, →ISBN