agnostic
definition
a person who believes that nothing is known or can be known about the existence of a god
example
As an agnostic, she often found herself exploring philosophical discussions about the existence of a higher power without committing to any particular belief.
synonyms
skepticnonbelieverdoubter
word origin — The term 'agnostic' was coined by the English biologist Thomas Huxley in 1869, derived from the Greek word 'agnostos' meaning 'unknown' or 'unknowable' (a- 'without' + gnostos 'known').