釘くぎ Common Noun English jmdict 1 noun (common) (futsuumeishi) nail;spike;tack;rivet;brad;(pachinko) pin その板に釘を打ってください。 Drive the nail into the board.
釘師くぎし Noun English jmdict 1 noun (common) (futsuumeishi) colloquial pachinko nail adjuster;pachinko parlor employee who adjusts the machines to regulate profit and loss