The phrase "hung by thread" refers to a situation that is perilous or uncertain. If we want to express the opposite meaning of this phrase, we can consider using antonyms. Some possible antonyms for "hung by thread" are stable, secure, firm, settled, assured, and reliable. For instance, we could say "the company's financial situation is secure" instead of "the company's future is hanging by a thread." Similarly, we could use "a firm decision" instead of "a decision hanging by a thread." By using antonyms, we can change the tone and direction of a statement, highlighting the positive aspects of a situation instead of emphasizing its risks and challenges.