逮捕 is the formal/legal term for arrest. Note the pronunciation is dàibǔ (4th tone on 逮), not dǎibǔ. When 逮 is used alone colloquially, it's pronounced dǎi.
grammar
Often used in passive constructions with 被: 被逮捕 (was arrested). Common collocations: 逮捕令 (arrest warrant), 逮捕嫌疑人 (arrest a suspect).
