Vocabulary consisting only from characters you are able to read

kanji kana meaning randomReload
空ける akeru vyprázdnit (láhev)ichidan, jlpt3, leda1, verb, vtrans
空く aku to become vacantgodan, jlpt3, jlpt5, leda1, verb, vintrans
san (num) threejlpt5, mix
一つ hitocu onejlpt5
sora skyjlpt5, leda1, shizen