Definition of irregularity in English:

irregularity

Syllabification: ir·reg·u·lar·i·ty
Pronunciation: /iˌregyəˈlaritē
 
/

noun (plural irregularities)

Origin

Middle English: from Old French irregularite, from late Latin irregularitas, from irregularis (see irregular).

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Word of the day grotesquerie
Pronunciation: grəʊˈtɛskəri
noun
grotesque quality or grotesque things collectively