'amidate' originates from 'English', specifically the word 'amide', where 'amide' meant 'a compound derived from ammonia by replacement of one or more hydrogen atoms by acyl groups'.

'amide' changed from 'French' word 'amide' and eventually became the modern English word 'amide'.

Initially, it meant 'a compound derived from ammonia', but over time it evolved into its current meaning of 'to convert into an amide'.