The irregular coastline of the fjord creates numerous sheltered inlets that support diverse marine ecosystems.
峡湾不规则的海岸线形成了许多避风的海湾，支持着多样的海洋生态系统。
Interviews conducted with retired commercial airline mechanics revealed that most did not cite physical strain or irregular shift schedules as their primary reason for retiring, but rather a desire to pursue hands-on restoration work on vintage aircraft as a personal hobby rather than a job.
From a Central Ideas and Details question · Information and Ideas
Which choice best defines “irregular”?
B — Not following a pattern. “irregular” means not following a pattern.
Which word means “not following a pattern”?
A — irregular. “irregular” means not following a pattern.
irregular — not following a pattern. In Chinese: 不规则的.
irregular is pronounced /ɪˈrɛɡjələr/.
The irregular coastline of the fjord creates numerous sheltered inlets that support diverse marine ecosystems. (峡湾不规则的海岸线形成了许多避风的海湾，支持着多样的海洋生态系统。)
uneven, erratic, abnormal — all close in meaning to irregular (not following a pattern).
regular, uniform — each the opposite of irregular (not following a pattern).
Yes. irregular is on the SAT Prep Basic list — the everyday academic words the SAT assumes you already have. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.