Entry Word: pertinacious

Function: adjective

Meaning: 1 continuing despite difficulties, opposition, or discouragement <a pertinacious little boy who was determined to catch and collect reptiles> — see persistent
2 sticking to an opinion, purpose, or course of action in spite of reason, arguments, or persuasion <a pertinacious salesman who would simply not take “No!” for an answer> — see obstinate