'entomophobe' originates from Greek via New Latin; specifically from Greek 'entomon' meaning 'insect' and 'phobos' meaning 'fear' combined in New Latin/modern English to form words referring to fear of insects.

'entomophobe' was formed in modern English from New Latin/Greek roots: Greek 'entomon' (insect) + 'phobos' (fear) yielded New Latin 'entomophobia', and the agent noun 'entomophobe' developed from that.

Initially related to the concept 'fear of insects' in technical/medical formation, it came to be used specifically for 'a person who fears insects' with little change in core meaning.