tribology (tray-BOL-uh-jee) - n., the study of friction, lubrication, and wear between moving surfaces.
Where there are two moving pieces that touch, there goes the tribologist. Materials science ahoy! With a side-order of mechanical engineering, of course. Coined around 1965 from Greek roots tribos, participle of tribein, to rub + -ology, study of.
farouche (fah-ROOSH) - adj., marked by sullen shyness and lack of social graces; wild.
The basic connotation being untamed. I've known a few teens this describes. Borrowed around 1765 from French farouche, shy/wild, from Old French, faroche, from Late Latin forasticus, from without, from Latin foras, out of doors, akin to Latin fores, door.