The phrase "it/that depends" refers to a situation where the answer is not clear-cut and cannot be given without further information. There are many synonyms for this phrase, including "uncertain", "undetermined", "variable", "conditional", "contingent", "subject to change", and "inconclusive". These words imply that the answer may be different depending on the circumstances or information presented. Other synonyms for this phrase include "up in the air", "in limbo", "pending", "unresolved", and "undecided". Whatever the synonym used, it's crucial to provide additional information to help resolve the uncertainty and provide a clear answer.