To examine something is to inspect or scrutinize it carefully. If you examine a piece of fruit before buying it, you’re giving it a thorough inspection. As a synonym for examine, peruse means “to survey or examine in detail” or sometimes “to read through with thoroughness or care.” A legally binding document is something you’d want to peruse, or read thoroughly, before signing. Attorneys in a trial will peruse, or examine in detail, evidence. But there’s a confounding twist: peruse is also used to mean “to scan or browse,” a breezy use that contradicts the careful attention to detail implied by its other meanings. Isn't English grand? All meanings are widely used and understood, but some style guides urge against the use of peruse as "to skim."