Ill-boding refers to something that is ominous or foreboding. It is a negative term used to describe situations or events that indicate something bad may happen in the future. The antonyms for ill-boding are optimistic, hopeful, auspicious, propitious, promising and encouraging. Optimistic refers to someone who has a positive outlook on the future. Hopeful means to be confident that something good will occur. Auspicious means to be favourable or promising. Propitious refers to something that brings good fortune. Promising means to show signs of future success, while encouraging means to inspire hope or confidence. These antonyms offer more positive connotations and can help to create a more optimistic outlook.