Sentence:  Already had Lecouturier, commonly called, from his Latin name, Sutor, taken the lead by launching against Erasmus, from his solitary chartreux cell, a publication replete with violence, in which he called his opponents theologasters, and <WSD>asslings</WSD>, imputing to them scandals, heresies, and blasphemies. 
Meaning of the word marked with <WSD> tags:  A small or young ass (all senses)