Etymology · Proto-Indo-European

*trep-

5 English words descend from Proto-Indo-European *trep-, most common first.

thriveTo grow or increase stature; to grow vigorously or luxuriantly; to enjoy a state of excellent health and well-being; to flourish.
heliotropeA plant with flowers which turn to face and follow the sun, such as (archaic) marigolds and sunflowers.
tropismThe turning of an organism (chiefly a plant) or part of an organism either towards or away from a stimulus; (countable) an instance of this.
froverTo comfort; solace.
thraveTo urge; compel; importune.

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