Crossword Dictionary

IRREGULAR

irregular, temporary - a 
lacking continuity or regularity; "an irregular worker"; "employed on a temporary basis" 

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Synoynms

capricious, erratic, intermittent, jerky, sporadic, uneven, unreliable, aberrant, eccentric, faltering, shifting, weaving

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Examples

It has a highly irregular shape, covered in bumps and indentations.

He visited his parents at irregular intervals.

Releasing the goods without an invoice is most irregular.

sentencedict

Etymology

late 14c., "not in conformity with Church rules," from Old French irreguler "irregular, incapable, incompetent" (13c., Modern French irrégulier), from Medieval Latin irregularis "not regular," from assimilated form of in- "not, opposite of" (see in- (1)) + Latin regularis "having rules" (see regular (adj.)). General sense of "not conforming to regular rules or principles" is from late 15c. "It expresses the fact of being out of conformity with rule, but implies nothing more with certainty. Yet the word is sometimes used in a sinister sense, as though it were a euphemism for something worse." [Century Dictionary] Meaning "unsymmetrical" is from 1580s. In reference to variable stars, from 1797.

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