Vocabulary consisting only from characters you are able to read

kanji kana meaning randomReload
愛人 あいじん loverai
いつの間にか いつのまにか before one knows, before one becomes aware of, unnoticed, unawaresjlpt3
土木 どぼく public worksmix
人口 じんこう populationjlpt4, leda1
山々 やまやま mountainsshizen