The antonyms for the phrase "coming ashore" would be "setting sail" or "departing from shore." These words imply the opposite action of arriving or reaching land. Setting sail would mean leaving the shore to go out to sea, while departing from the shore would mean leaving land entirely. The phrase "coming ashore" often refers to the act of disembarking from a boat or ship, reaching a destination or a port. Conversely, "setting sail" or "departing from shore" typically refers to the start of a journey on water. These antonyms provide a clear contrast to the action of coming ashore, highlighting the opposite direction of travel.