Audibly is the adverb from audible. It means “in a way that other people can hear.” If you laugh audibly, the laugh is not only in your head — it comes out. If a teacher says “Please answer audibly,” they want your voice in the room, not a mouth moving with no sound. It often describes small sounds we did not fully mean to share: you sigh audibly, groan audibly, or speak so audibly that the next table hears you. Put with a verb, it tells you the action made a hearable sound. It is not a stronger word than audible; it is simply the form you need when you are describing how someone did something, not what the sound was like.