1. provide evidence for

2. authenticate; affirm to be true, genuine or correct

3. establish or verify the usage of

4. give testimony in a court of law

at great speed; rapidly 

To augur is to show or suggest, especially from omens, that something might happen in the future. Used most often in formal speech or writing, augur is often followed by an adverb, such as well.

// The downturn augurs badly for the success of the business.

Scrupulous describes someone who is very careful about doing something correctly, or something marked by such carefulness. Scrupulous can also describe someone who is careful about doing what is honest and morally right.

// She was always scrupulous about her work.

// Being an editor requires scrupulous attention to detail.

// Less scrupulous companies find ways to evade the law.

To exasperate someone is to cause them irritation or annoyance, or to make them angry.

// We were all exasperated by the delays.

Beltane refers to the Celtic May Day festival.

// Beltane falls each year approximately halfway between the spring equinox and the summer solstice.

Evanescent is a formal and literary word that describes something that only lasts a very short time.

// Our acting coach always reminded us that fame is evanescent, and that we should pursue a life in the theater purely for the love of the art.

A boondoggle is an expensive and wasteful project usually paid for with public money. Boondoggle is also a word for a braided cord worn by Boy Scouts as a neckerchief slide, hatband, or ornament.

// Critics say the dam is a complete boondoggle—over budget, behind schedule, and unnecessary.

To juxtapose things is to place them together in order to create an interesting effect or to show how they are the same or different.

// The local museum’s new exhibit juxtaposes modern art with classical art.