Po-faced is a term used to describe someone who is stern, serious, and unsmiling. Antonyms for this term include lively, light-hearted, jovial, and amiable. To add more, an individual that is po-faced is also gloomy, therefore, the antonym can be cheerful, lively, or ebullient. Those who are po-faced may seem cold, so antonyms for it can be welcoming and friendly. A po-faced person may also seem unapproachable, and therefore, the antonym can be outgoing, affable, or cordial. In essence, po-faced can be replaced with many positive and cheerful words that express a warm disposition and a friendly demeanor.