acharner

Etymology
Related to and.

Verb

 * 1)  to incite; to sic
 * 2)  to hound, to fiercely attack
 * 3)  to slave away, to persevere
 * 4)  to attach oneself excessively
 * 1)  to slave away, to persevere
 * 2)  to attach oneself excessively