Vocabulary consisting only from characters you are able to read
老若
ろうじゃく; ろうにゃく
young and old, all ages; young and old, all agesmix
無効
むこう
invalid, no effect, unavailable, illegalmix
案件
あんけん
matter in question, subjectkaiwa
開通
かいつう
opening, open, taking effect, becoming activesuru