Learn how to say Aestivating correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word aestivate:
[no object] Zoology
(of an insect, fish, or amphibian) spend a hot or dry period in a prolonged state of torpor or dormancy.
early 17th century (in the sense ‘pass the summer’): from Latin aestivat-, from aestivare ‘spend the summer’, from aestus ‘heat’