1. attack someone physically or emotionally

- Nightmares assailed him regularly

Similar word(s): assault, attack

Definition categories: competition

2. launch an attack or assault on; begin hostilities or start warfare with

- Serbian forces assailed Bosnian towns all week

Similar word(s): attack

Definition categories: competition, contend, fight, struggle

3. attack in speech or writing

Similar word(s): assault, attack, round, snipe

Definition categories: communication, criticise, criticize, knock

Sentences with assail as a verb:

- Muggers assailed them as they entered an alley.

- For the next six months or so those children will assail her in public with demands for an improper story! (from H.H. Munro's short story, "The Storyteller").