"back" means "등" in Korean. | Korean/English dictionary

Korean(Pronunciation)	Meaning
등극하다(sokui-suru), 頂点に立つ, 王位につく
등산객(tozan-kyaku), 登山者, ハイカー	trekker
등재(tou-sai), 登録	load
초등생	elementary student
외국인 등록증(gaikokujin-touroku-shou)	certificate of alien registration
열등감(nettokan)	sense of inferiority
열등(retto)	inferiority
균등하다(kinto-da)	equal
균등(kinto)	equality
평등하다(byodo-na)	equal
초등학생	schoolchild
등불(akari), 灯り(toka), ともし	light
등산복(tozan-huku)	mountaineering wear
강등(koukaku)	degradation
등잔 밑이 어둡다, 近すぎてかえって気づかない	It's dark right below the lamp post.
귓등으로 듣다	hear abstractedly
등록금(touroku-kin), 授業料(jyugyou-ryou)	tuition
등유(touyu), ガソリン	kerosene
등고선(tou-kou-sen)	contour
가로등(gaitou), 街路灯(gairo-tou)	lamppost