LATIN DICTIONARYLexicon Latīnum
adverb

abusive

abusive (not comparable)
Classical[a.buːˈsiː.wɛ]Ecclesiastical[a.buˈs̬iː.ve]

Meaning

  1. not comparablewrongly, in an incorrect manner, by catachresis
  2. not comparableslightly, not really in earnest

Latīnē defined in Latin in our graded readers

ăbūsīvē, adv. abusivus.
I. By an improper use, Quint. 8, 6, 35; 9, 2, 35.—
II. Slightly, not in good earnest, Amm. 24, 4.

Quick answers

What does abusive mean in Latin?
abusive, a adverb, means “wrongly, in an incorrect manner, by catachresis; slightly, not really in earnest”.
How do you pronounce abusive?
In classical Latin, [a.buːˈsiː.wɛ]; in ecclesiastical (church) Latin, [a.buˈs̬iː.ve].