Vocabulary consisting only from characters you are able to read
開閉
かいへい
opening and shuttingsuru
便利さ
べんりさ
convenience, handiness, usefulnessmix
便り
たより
(1)news, tidings, information, correspondence, letter; (2)news from ... mix
百万
ひゃくまん
(1)1,000,000, one million, million, (2)many mix