IPA: /ˈθiːɪst/
KK: /θiːɪst/
A person who believes that a God exists, particularly a personal God who is involved in the world.
As a theist, she believes in a higher power that guides her life.
The word 'theist' is formed from 'theo-' (from Greek 'theos', meaning god) and '-ist' (meaning one who practices or is concerned with). A theist is someone who believes in the existence of a god or gods.
Think of 'theo' meaning god, and remember that a theist is someone who believes in a god.