retrieve B2

/ɹɪˈtɹiːv/ To get something back or bring it back from where it is.

tropical B1

/ˈtɹɑ.pɪ.kəl/ Belonging to or coming from the hot, wet regions near the equator.

thrive C1

/θɹaɪv/ To grow strong and healthy.

tropic B2

/ˈtɹɒpɪk/ One of two imaginary lines around the Earth, north and south of the equator, marking the edges of the hottest region.