Vocabulary consisting only from characters you are able to read
老化
rouka
ageing, aging, senile deteriorationsuru
日独
nichidoku
Japan and Germany, Japanese-Germanmix
公害
kougai
pollution, public nuisance, contaminationmix
勉める
tsutomeru
to endeavor (endeavour), to try, to strive, to make an effort, to exert oneself, to be diligentichidan, verb, vtrans