The antonyms for the word "bottle up" are release, express, and let out. When one bottles up their emotions or feelings, they suppress or conceal them within themselves, which is often unhealthy and can lead to stress or anxiety. To release or express these emotions and feelings is the opposite of bottling them up. It involves giving voice to what is on one's mind or heart, allowing them to communicate freely and openly without fear of judgment or shame. Letting out one's concerns or thoughts can help relieve stress and promote mental well-being. Therefore, rather than bottling up, one must learn to release and express their emotions, which ultimately leads to a happier and healthier life.