The phrase "strikes dumb" means to render someone speechless or unable to express their thoughts or feelings. Antonyms for "strikes dumb" could include words like articulate, communicative, expressive, or loquacious. These words indicate the opposite of being silenced or unable to communicate effectively. Someone who is articulate can easily express their thoughts and ideas through speech or writing, while someone who is communicative is able to effectively communicate and express themselves with others. Being expressive means that someone is able to convey their emotions and feelings through language or body language. Finally, someone who is loquacious is extremely talkative and enjoys conversing with others.