Synonym of “laconic” is:

A synonym is a word or phrase that means exactly or nearly the same as another word or phrase. The word "laconic" describes a style of speaking or writing that uses very few words, often to the point of being concise or terse. It implies a deliberate brevity in communication.

• The correct synonym is Brief, which accurately reflects the core meaning of using few words or being short in duration or extent. A laconic response is a brief one.
• Verbose is an antonym of "laconic," meaning using or expressed in more words than are needed.
• Talkative also describes someone who uses many words, making it an antonym.
• Fluent refers to the ability to speak or write easily and accurately. While a laconic person can be fluent, fluency does not inherently imply brevity; one can be fluent and verbose, or fluent and laconic.