Vocabulary consisting only from characters you are able to read
水力
suirjoku
hydraulic power, water powermix
足りない
tarinai
(1)insufficient/not enough/lacking/ (2)dim-witted/slow/one brick short of a full load adj
石
koku
(1)measure of volume (approx. 180.39 liters, 6.37 cub. ft.)/ (2)measure of a Japanese-style boat's loading capacity (approx. 278.26 liters)/(P) leda1