irregular

US /ɪˈreɡ.jə.lɚ/
UK /ɪˈreɡ.jə.lɚ/
"irregular" picture
1.

irregular, desigual

not even or regular in shape, arrangement, or distribution

:
The coastline is very irregular, with many coves and inlets.
A costa é muito irregular, com muitas enseadas e entradas.
He has an irregular heartbeat.
Ele tem um batimento cardíaco irregular.
2.

irregular, anormal

not conforming to established rules or methods; abnormal

:
The verb 'to be' is an irregular verb in English.
O verbo 'to be' é um verbo irregular em inglês.
His attendance at meetings has been very irregular.
A sua presença nas reuniões tem sido muito irregular.