Vocabulary consisting only from characters you are able to read

kanji kana meaning randomReload
空っぽ karappo prázdnýleda1
二つ futatsu twojlpt5
空く aku to become vacantgodan, jlpt3, jlpt5, leda1, verb, vintrans
三つ mittsu threejlpt5
空ける akeru vyprázdnit (láhev)ichidan, jlpt3, leda1, verb, vtrans