Annotations to James Joyce's Ulysses/Eumaeus/588

Annotations
instanter   immediately, without delay. The English word instanter has been borrowed from Latin, where it means vehemently, urgently. The narrator of this episode (Bloom?) italicizes most expressions that have been borrowed from foreign languages, even when they have become naturalized English expressions or now mean something different.

paterfamilias   (Latin) father of the household. The term paterfamilias is now a naturalized English word with the same meaning as the medieval Latin.

corruptio per se and corruptio per accidens   (Latin) corruption of itself and accidental corruption. Stephen is alluding to Thomas Aquinas's Summa Theologica, Part 1, Question 75, Article 6: