"Heave ho" is a phrase commonly used by sailors and crew members to coordinate the lifting of heavy objects. The word "heave" generally means to lift or hoist something, while "ho" is used as a signal to lift simultaneously. Antonyms for this phrase would include lowering, dropping, or letting go. While "heave ho" suggests an upward movement, antonyms like lower and drop imply a downward movement. Similarly, "let go" suggests the release of an object rather than lifting it. These antonyms provide a more comprehensive understanding of the movements involved in lifting and lowering objects.