Vocabulary consisting only from characters you are able to read
区
く
městská část (v adresách)leda1
集中力
しゅうちゅうりょく
(powers of) concentration, ability to concentratemix
三日
みっか
three days, the third day of the monthjlpt5, toki
空前
くうぜん
unprecedented, record-breakingmix
口語
こうご
(1)spoken language, (2)literary style based on (modern) spoken language bunpou