irregular

柯林斯词典

1. ADJ If events or actions occur at irregular intervals, the periods of time between them are of different lengths. 不规律的
Cars passed at irregular intervals. 汽车以不规律的时间间隔驶过。
She was taken to a hospital suffering from an irregular heartbeat. 她因心律不齐而被送进医院。
2. irregularlyADV 不规律地[ADV with v]
He was eating irregularly, steadily losing weight. 他吃饭不规律，体重不断下降。
3. ADJ Something that is irregular is not smooth or straight, or does not form a regular pattern. 不规则的; 不平整的
He had bad teeth, irregular and discoloured. 他的牙齿不好，不整齐，而且变了色。
4. irregularlyADV 不规则地; 不平整地
Located off-centre in the irregularly shaped lake was a fountain. 在那个形状不规则的湖的中心之外，有一个喷泉。
5. ADJ Irregular behaviour is dishonest or not in accordance with the normal rules. 不正规的; 不合常规的
...irregular business practices. …不合常规的商务活动。
6. irregularityN-VAR 不正当; 不合常规
He faced charges arising from alleged financial irregularities. 他面临涉嫌不正当财务行为的控告。
7. ADJ An irregular verb, noun, or adjective has different forms from most other verbs, nouns, or adjectives in the language. For example, "break" is an irregular verb because its past form is "broke," not "breaked." 不规则的

That is the pattern for most verbs , but some verbs are irregular and behave differently.
A visitor can't wander around the building unaccompanied - that would be most irregular.
The company was sold off in a rather irregular way, as I remember .
The enquiry showed that various financial transactions had been carried out in a very irregular manner .
If there was something irregular about how the system was shut down, you will get this message on screen .