IPA: /ˈbɒtənɪst/
KK: /ˈbɑːtənɪst/
A person who studies plants and their growth, classification, and uses.
The botanist discovered a new species of flower in the rainforest.
Botanist → It is formed from "botan" (from Greek "botanē", meaning plant or herb) and "-ist" (meaning one who specializes in or practices). A botanist is someone who specializes in the study of plants.
Think of a person who studies 'plants' ('botan') — that's what a botanist does.