Vocabulary consisting only from characters you are able to read
手にする
tenisuru
(1)to hold (in one's hand), to take (into one's hand), (2)to own, to obtain suru
手がかり
tegakari
(1)clue, key, trail, scent, track, contact, (2)handhold, on hand mix
二十日
hatsuka
twenty days, twentieth day of the monthjlpt5, toki
上る
noboru
(1)to rise, to go up, to come up, to ascend, to be raised, (2)to enter (esp. from outdoors), to come in, to go in, (3)to enter (a school), to advance to the next grade, (4)to get out (of water), t godan, jlpt3, verb, vintrans
水力
suiryoku
hydraulic power, water powermix