Answer:
They should end up like this. 下+上 姉+妹 混+隔 永+短 双+片
下 KA, o(riru), kuda(ru), shita, moto, sa(geru), sa(garu) - down, below, lower
上 JOU, a(geru), ue, a(garu), nobo(ru) - up, above, rise
姉 SHI, ane - elder sister
妹 MAI, imouto - younger sister
混 KON, ma(zeru), ma(zaru) - mix
隔 KAKU, heda(teru), heda(taru) - separate, interpose, be distant
永 EI, naga(i) - long (time)
短 TAN, mijika(i) - short
双 SOU, futa - pair, both
片 HEN, kata - part, one of two