Vocabulary consisting only from characters you are able to read
中
naka
inside, middle, amongjlpt5
下る
kudaru
(1)to descend, to go down, to come down, (2)to be handed down (of an order, judgment, etc.), (3)to pass (of time), (4)to surrender, to capitulate, (5)(often in neg. form) to be less than, to be i godan, jlpt3, verb, vintrans
学力
gakuryoku
scholarship, knowledge, literary abilitymix
水力
suiryoku
hydraulic power, water powermix