Very well, exceedingly well, as in You know full well how much this costs. [c. 1700]
Well vs. GoodSomeone may have told you you were wrong for saying, I’m good, instead of the more formal I’m well. But is the response I’m good actually incorrect? Not technically. Let’s explore the rules and conventions for these two words. Well is often used as an adverb. Adverbs can modify verbs, adjectives, and other adverbs. Good is most widely used as an adjective, meaning that it can …
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.