To vouchsafe something is to give it, grant it, or tell it — but with an old and particular flavour: the giver is above the receiver, and the gift is a kindness they did not have to give. A king vouchsafes an audience; heaven vouchsafes a sign; a great man vouchsafes an answer to a small question. The grammar follows that picture: you vouchsafe something **to** someone, or vouchsafe someone something ("he vouchsafed her no reply"). It also carries the older "vouch" idea of standing behind what you say, so a thing vouchsafed is offered as trustworthy. In modern English this word is nearly always doing one of two jobs. In old texts — the Bible, Shakespeare, Victorian novels — it is sincere and respectful. In writing today it is usually dry and a bit mocking: "He finally vouchsafed that the train might be late" means the speaker was being annoyingly grand about a very ordinary piece of news. That second, teasing use is by far the more common one now, and it is the one to recognise when you meet it. A very common pattern is the negative: "she vouchsafed no explanation" — she didn't lower herself to explain.

屈尊給予、賜予（現代多帶嘲諷：擺架子才肯開口說）