Vocabulary consisting only from characters you are able to read
改める
aratameru
(1)to change, to alter, to revise, to replace, (2)to reform, to correct, to mend, to improve, (3)to examine, to check, to inspect, (4)to do properly, to do formally ichidan, verb, vtrans
完成
kansei
(1)complete, completion, (2)perfection, accomplishment jlpt3, suru
倍
bai
(1)twice, double, (suf) (2)times, -fold jlpt3