irregular

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

不規則的, 不平坦的

not even or regular in shape, arrangement, or distribution

:
The coastline is very irregular, with many coves and inlets.
海岸線非常不規則,有許多海灣和入口。
He has an irregular heartbeat.
他有不規則的心跳。
2.

不規則的, 異常的

not conforming to established rules or methods; abnormal

:
The verb 'to be' is an irregular verb in English.
動詞“to be”在英語中是不規則動詞
His attendance at meetings has been very irregular.
他參加會議的情況一直非常不規律