'axiologist' originates from English, specifically formed from the word 'axiology' + the suffix '-ist', where 'axiology' ultimately derives from Greek 'axios' meaning 'worthy' and Greek 'logos' meaning 'study'.

'axiologist' developed after the early 20th-century formation of 'axiology' (from Greek roots 'axios' + 'logos'); English added the agentive suffix '-ist' to produce 'axiologist' meaning a specialist in axiology.

Initially the root terms referred to 'worth' and 'study' (study of what is worthy); over time the compound 'axiology' came to denote the field of value theory, and 'axiologist' came to mean 'a person who studies that field.'