'anthropomorphize' originates from Greek elements via Modern/ New Latin and English formation: from Greek 'anthrōpos' meaning 'human' and 'morphē' meaning 'form', plus the verb-forming suffix '-ize' (from Greek via Latin/French).

'anthropomorphize' was formed in English from the noun 'anthropomorphism' (from Modern Latin 'anthropomorphismus'), which itself derives from Greek 'anthrōpomorphos' ('human-shaped'); English added the productive verb suffix '-ize' to form the verb.

Initially it could mean more literally 'to give human form'; over time it evolved into the broader sense 'to attribute human characteristics or intentions' to non-human things, often used metaphorically.