추진propulsion; pushing; driving 후진국underdeveloped country; less developed country 선진being advanced 선진국advanced country; developed country 직진straight movement 진로course 진출expansion 진학entrance to a higher education institution 진행progress 진행자host; emcee

동갑same age 환갑age 60; 60th birthday 회갑one's sixtieth birthday; the age of sixty 회갑연one's sixtieth birthday party 갑the former; the one; A 갑각류crustaceans 갑론을박heated debate 갑부superrich 갑상선thyroid 갑주armor and helmet