ADV [ADVERB with verb, ADVERB adjective]极度地;极大地 You use immeasurably to emphasize the degree or extent of a process or quality. 极度地;极大地 [formal, emphasis]
They have improved immeasurably since their arrival.
他们自来到这里以后,有了很大改进。
The situation today is immeasurably more acute than it was 25 years ago.