Short-spoken is defined as someone who speaks using few words or in a concise manner. The antonym for short-spoken is someone who speaks at length or in a verbose manner, which is the opposite of speaking briefly. Some other antonyms for short-spoken include garrulous, loquacious, verbose, wordy, and prolix. These words refer to a person who tends to talk excessively or use more words than necessary. Alternatively, the antonym for short-spoken can be someone who is reticent, taciturn, or reserved, which means they are reluctant to speak or communicate their thoughts or feelings.