Vocabulary consisting only from characters you are able to read

kanji kana meaning randomReload
お兄さん おにいさん (honorable) older brotherjlpt5, kazoku, leda1
指輪 ゆびわ ringfuku, jlpt3, jlpt4
頭がい骨 ずがいこつ skullhito
解禁 かいきん lifting a bansuru
代数 だいすう algebramath