Which of the following terms suggests an abusive verbal attack?

The term that suggests an abusive verbal attack is "invective." Invective refers to a strong denunciation or condemnation, characterized by harsh and insulting language. It often involves a verbal assault where one person attacks another's character or actions with scornful or abusive statements. This term is commonly used in contexts where rhetoric is employed to criticize or demean someone forcefully.

In contrast, the other terms do not imply abusive language. "Laconic" describes a style of speaking that is brief and to the point, lacking in verbosity. "Irascible" pertains to a person who is easily provoked to anger but does not directly relate to verbal attacks. "Inure" means to become accustomed to something unpleasant, which also does not convey the notion of verbal abuse. Therefore, the specific nature of invective aligns precisely with the idea of an abusive verbal attack.