The phrase "comes on strong" typically means someone is being forceful or aggressive in their behavior or communication. Antonyms for this phrase could include "soft-spoken," "reserved," "mild-mannered," or "low-key." For instance, a person who is shy and withdrawn might be described as "coming on weak," while someone who is speaking in a calm and measured tone could be said to "come on gently." Other antonyms might include "subtle," "moderate," "measured," or "restrained." By exploring different ways to describe someone's behavior, you can convey a more nuanced understanding of their personality and communication style.