the.com/irregular
The rule is that it breaks the rule, predictably enough to need its own name.
means Not conforming to an expected pattern, schedule, standard, or shape — uneven, inconsistent, or out of the ordinary.
from From Latin irregularis: in- (not) plus regula (rule), the same measuring stick that gave us 'ruler' — literally off the straightedge.
Grammar's rebelsEnglish's commonest verbs are its most irregular.
Military senseIrregulars fight outside the formal army's chain of command.
Retail spinFactory 'irregulars' are flawed goods sold cheaper.