Vocabulary consisting only from characters you are able to read
断る
ことわる
(1)to refuse, to reject, to dismiss, to turn down, to decline, (2)to inform, to give notice, to tell in advance, (3)to ask leave, to excuse oneself (from) godan, jlpt3, verb, vtrans
返る
かえる
(1)to return, to come back, to go back, (2)to turn over, (suf,v5r) (3)(after the -masu stem of a verb) (to become) extremely, (to become) completely godan, verb, vintrans
車両
しゃりょう
rolling stock, railroad cars, vehiclesryokou
数式
すうしき
numerical formulamix