Failingly is an adverb that means "in a manner that results in failure" or "with an absence of success." Some synonyms for failingly are unsuccessfully, ineffectively, fruitlessly, unproductively, and futilely. These words describe actions that do not yield positive results or outcomes. Other synonyms include in vain, without success, without result, or in a losing effort. There are also more vivid synonyms, such as botched, bungled, and flubbed, which suggest a clear and even comical failure. Whatever the context, it's important to use the right synonym for failingly to accurately convey the idea of failure and its related emotions.