Vex-ā'tious, a.

a. [See supra.] 1. Causing vexation; vexing; teasing; annoying; disturbing or agitating to the mind; causing disquiet; afflictive; as, a vexatious controversy; a vexatious neighbor.

2. Distressing; harassing. “Continual vexatious wars.” South.
3. Full of vexation, trouble, or disquiet.

He leads a vexatious life. Digby. Vexatious suit (Law), a suit commenced for the purpose of giving trouble, or without cause.