Vocabulary consisting only from characters you are able to read

kanji kana meaning randomReload
屋外 おくがい outdoors, alfrescomix
立つ たつ to standgodan, jlpt3, jlpt5, verb, vintrans
開集合 かいしゅうごう open setmath
由来 ゆらい origin, source, history, derivation, reason, destinyall
速やか すみやか speedy, prompt, smoothmix