Ring in is a phrasal verb that means to celebrate or herald the start of something. It is often used to describe the act of welcoming in a new year or marking the beginning of a new era. Some synonyms for ring in include welcome, commence, initiate, inaugurate, start, begin, usher in, initiate, and launch. Each of these words carries a similar connotation of starting anew, observing a new beginning, or initiating change. Whether it's the beginning of a new year, a new semester, or a new phase in life, ringing in the occasion is an important tradition that involves hope, optimism, and positive change.