Late 18th century; earliest use found in Ethan Allen (1738–1789), revolutionary army officer and politician in America. From classical Latin perspīrāt-, past participial stem of perspīrāreperspire + -ing.
Definition of perspirating in US English:
perspirating
adjectiveˈpəːspɪreɪtɪŋ
rare
That perspires.
Origin
Late 18th century; earliest use found in Ethan Allen (1738–1789), revolutionary army officer and politician in America. From classical Latin perspīrāt-, past participial stem of perspīrāre perspire + -ing.