obeyad
A person who works their butt off until the job is done, even if it means screaming at the printer.
My dad is the most perseverent guy. He fixed the car, the roof, and the printer like it was a personal enemy.
My little sister is so perseverent, she practiced piano for three hours and still yelled at the piano.
My boss is a perseverent beast. He worked through the weekend and still gave me a hard time for being late.