'antimoniate' originates from modern chemical/New Latin usage, specifically from 'antimony' + the suffix '-ate', where the suffix '-ate' meant 'salt or ester of'.

'antimoniate' was formed in modern chemical nomenclature from the element name 'antimony', which in earlier stages appeared as Old French 'antimoine' and Medieval Latin 'antimonium', and was combined with the chemical suffix '-ate' to produce the term used in English.

Initially the root referred broadly to the element antimony or things relating to it; over time the derived term 'antimoniate' came to denote specifically a salt or ester of antimonic acid.