Quick-witted means fast to understand and to respond. A quick-witted reply.
It is about speed rather than depth, and the two do not always travel together. A quick-witted answer in the moment beats a better one thought of on the stairs.
1adjectivequick-wittedFast to understand and to respond.
“The quick-witted answer saved the whole interview.”
quick-witted is a quality.
quickwitted quick + witted.
Etymology from Wiktionary, CC BY-SA