Vocabulary consisting only from characters you are able to read
外界
がいかい
physical world, the externals; physical world, the externalsmix
一兆
いっちょう
1,000,000,000,000, one trillion, one billion (obs. British)mix
兆し
きざし
signs, omen, symptomsmix
連日
れんじつ
every day, prolongedmix