Pronunciation guide: IPA symbols, stress and word endings

θ	thin	ð	this	ʃ	she	ʒ	measure
tʃ	church	dʒ	judge	ŋ	sing	j	yes

p b t d k g f v s z h m n l r w sound as in ordinary English spelling.

ˈ main stress, before the stressed syllable: /ˈwɔːtə/ water · ˌ lighter (secondary) stress: /ˌʌndəˈstænd/ understand
ː a long vowel · (r) an r said only in accents that pronounce it (most American, Scottish, Irish)

-s / -es (plurals; he/she form of verbs): /s/ after voiceless sounds (cats), /z/ after voiced (dogs), /ɪz/ after s, z, sh, ch, j sounds (buses, watches). Spelling: -es after s, x, z, ch, sh; consonant + y → -ies (city → cities).
-ed (past): /t/ after voiceless sounds (walked), /d/ after voiced (played), /ɪd/ after t or d (wanted). Spelling: love → loved, stop → stopped, carry → carried.
-ing: make → making, run → running, see → seeing.
Irregular: go, went, gone · be, was, been · see, saw, seen · man → men · child → children · mouse → mice.
Older (King James) forms: -eth = -s (he loveth = he loves) · -est with “thou” (thou lovest) · spake = spoke.

irregularity

/ɪˌɹɛ.ɡjʊˈlæ.ɹɪ.ti/ noun

Forms irregularities

noun (countable) An instance of being irregular.
noun (uncountable) The state or condition of being irregular, or the extent to which something is irregular.
noun (countable) An object or event that is not regular or ordinary. “an irregularity of surface”
noun (countable) A violation of rules. “An investigation of the irregularities in the company's accounts uncovered a large-scale fraud.”
noun (euphemistic) Irregular bowel movement (e.g. diarrhea or constipation).

Synonyms

From Middle French irrégularité, from Medieval Latin irregularitas. Morphologically irregular + -ity.

Etymology [Cf. F. irrégularité.]

Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “irregularity”, CC BY-SA 4.0. Details

Sanskrit dictionary entries whose meaning includes “irregularity” (best matches first).

अविधि a-vidhi void of or contrary to rule; ( is ), f. irregularity.
अविधान a-vidhāna deviation from or absence of fixed rule, irregularity.
अव्यवस्था a-vyavasthā irregularity, deviation from established rule; incorrect legal opinion.
अन्याय a-nyāya unjust or unlawful action; impropriety, indecorum; irregularity, disorder.
निपात्य ni-pātya to be cast down or overthrown; to be put down or mentioned as an irregularity.
अतिवर्तिन् ati-vartin crossing, passing; guilty of a pardonable offence or of pardonable irregularity.
अपथ a-patha not a way, absence of a road, pathless state, irregularity, deviation; heresy, heterodoxy; the vulva; ( as, …
यन्तुरम् yanturam acc. sing. m., in Ṛg-veda III. 27, II, VIII. 19, 2. explained by Sāy. as an irregularity for yantāram, and u…