The term 'unworthy one' is a negative label that can be replaced with more suitable words to avoid being offensive. Some of the synonyms that can be used include undeserving, disqualified, unfit, inadequate, disappointing, unworthy, and unacceptable. Each word has a particular nuance that may be more appropriate to express an opinion in a given context. Unworthy one may be used to indicate that someone is not good enough for a task or position, but using alternative words can show more specificity and precision. Choosing the right synonym for the given situation is vital to convey the intended meaning without being impolite or derogatory.