vexatious

adjective4

1. •
   Causing vexation or annoyance; teasing; troublesome.
2. •
   Commenced for the purpose of giving trouble, without due cause.
3. •
   In the habit of starting vexatious litigation and therefore liable to have restraints placed on one's ability to access the courts.
4. •
   (no longer used) Full of trouble or disquiet

   • He leads a vexatious life. — 1644