Vocabulary consisting only from characters you are able to read
明らか
akiraka
obvious, evident, clear, plainmix
便利さ
benrisa
convenience, handiness, usefulnessmix
万
man
(num) 10,000, ten thousand, (adv) myriads, alljlpt5
開閉
kaihei
opening and shuttingsuru
便り
tajori
(1)news, tidings, information, correspondence, letter; (2)news from ... mix