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
冷ます
さます
to cool (e.g. from a high temperature to room temperature), to dampen, to let cool, to throw a damper on, to spoilgodan, jlpt3, verb, vtrans
表す
あらわす
(1)to reveal, to show, to display, (2)to express, (3)to represent, to signify, to stand for, (4)to make widely known godan, jlpt3, verb, vtrans
福島
ふくしま
Fukushima (city, prefecture, and nuclear power plant))namae
石
こく
(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
宿す
やどす
(1)to keep (guest), (2)to conceive, (3)to carry (virus), (4)to entrust godan, verb, vtrans
観察
かんさつ
observation, surveysuru
唱える
となえる
(1)to recite, to chant, (2)to cry, to yell, to shout, (3)to advocate, to advance, to preach, to insist ichidan, verb, vtrans
神童
しんどう
prodigy, wonder childmix
末期
まっき
(1)closing years (period, days), last stage, end stage, end-of-life (care, decision making, etc.), (adj-f) (2)terminal (e.g. cancer, disease, etc.), final mix
交流
こうりゅう
(1)(cultural) exchange, interchange, interaction, (inter-) mingling, (social, etc.) networking, intercourse, (2)alternating current, AC suru
石器
せっき
stone implementmix
養う
やしなう
to rear, to maintain, to support (e.g. family), to cultivategodan, verb, vtrans
器官
きかん
organ (of body), instrumentmix