Foreboding is an adjective that refers to a sense of impending doom or prediction of a negative outcome. Its antonyms include confident, optimistic, hopeful, and reassuring. These words all express feelings of positivity and expectation of a positive outcome, rather than a negative one. Additionally, antonyms for foreboding can include peaceful, serene, and calm. These adjectives convey a sense of tranquility and lack of disturbance or unrest, which is the opposite of the tense and anxious feelings associated with foreboding. Overall, using antonyms for foreboding can enhance the tone of writing or communication by emphasizing positivity and calmness instead of negativity and worry.