irregular
UK: ɪˈreɡjələ | US: ɪˈreɡjələr
adj. not following a regular pattern; uneven or variable
adj. contrary to rules or customs; abnormal
n. a person or thing that is irregular
irregular = ir<not> + regular<rule>
- ir<not>: A prefix derived from Latin in- (negation), altered to ir- before r.
- regular<rule>: From Latin regula (rule) + -ar (adjective suffix), meaning "conforming to rules."
Etymology Origin:
The word "irregular" combines the negative prefix ir- (a variant of in-) with regular, which traces back to Latin regula (a straight stick or rule). Originally used in geometry to describe shapes deviating from standard forms, it later expanded to describe behaviors or patterns defying norms. The prefix ir- logically flips the meaning to "not rule-bound," reflecting its Latin roots in structure and negation.
The coastline is irregular, with many small bays and inlets.
His attendance at work has been irregular this month.
The army dealt harshly with irregular forces.
An irregular heartbeat may require medical attention.
The verb "go" has an irregular past tense form ("went").