'ammonitess' originates from the Hebrew word 'עַמּוֹנִית' (Ammonit), where 'עַמּוֹן' (Ammon) referred to the Ammonite people.

'ammonitess' was derived from the Hebrew term 'עַמּוֹנִית' and was adopted into English to specifically denote a female member of the Ammonite people.

Initially, it meant 'a female member of the Ammonite people,' and this meaning has remained consistent in modern usage.