Foreboding is a term that refers to a feeling or sense of impending doom or anxiety about the future. Its opposite, or antonym, is hopefulness, which signifies a sense of optimism or expectation for good things to come. Another antonym for foreboding is confidence, which means having faith in oneself or others to succeed and overcome obstacles. Serenity is also an antonym for foreboding, implying a sense of peacefulness or tranquility in the present moment. Lastly, contentment is an antonym for foreboding that denotes a feeling of satisfaction or happiness in one's current circumstances.