This is partly true, because even a slightly abusive expression might result in discord or rupture between seemingly close friends.

abusive 是形容词，由动词 abuse（虐待、辱骂）加上后缀 -ive 构成。abuse 本身由前缀 ab-（表示"偏离"）和词根 use（使用）组成，字面意思是"错误使用"，引申为"滥用、虐待"。 abusive 意思是"辱骂的、虐待的"，形容言语或行为带有侮辱性。