Vocabulary consisting only from characters you are able to read
下る
kudaru
(1)to descend, to go down, to come down, (2)to be handed down (of an order, judgment, etc.), (3)to pass (of time), (4)to surrender, to capitulate, (5)(often in neg. form) to be less than, to be i godan, jlpt3, verb, vintrans
会合
kaigou
(1)meeting, assembly, (2)(chem) association, (3)(astronomical) conjunction suru
母国語
bokokugo
mother tongue, native languagemix
国字
kokuji
(1)country's official writing system, native script, (2)kana, (3)kanji that originated in Japan (as opposed to China) bunpou