Vocabulary consisting only from characters you are able to read
必ず
かならず
always/without exception/necessarily/certainly/without fail/positively/invariably/(P)jlpt3, jlpt4, leda1
古老
ころう
old people, seniors, elders, old-timermix
期待
きたい
expectation, anticipation, hopemix
原動力
げんどうりょく
motive power, driving forcemix
海神
わたつみ
Watatsumi, dragon, as well as god of the seakami