IPA: /lɛksɪˈkɒlədʒɪst/
KK: /lɛkˈsɪkəˌlɒdʒɪst/
A person who studies the history and meaning of words and dictionaries.
The lexicologist spent years researching the origins of various words.
Lexicologist → It is formed from "lexicon" (from Greek "lexikon", meaning word or vocabulary) and "-ologist" (from Greek "-logia", meaning study or science). A lexicologist is someone who studies words and their meanings.
Think of a 'lexicon' as a collection of words and remember that a 'lexicologist' is someone who studies that collection.