MORE TRANQUIL is a term that can be used to describe a situation or environment that is more peaceful and relaxed than before. The crossword solutions for this term are SEDATER (7 letters), SERENER (7 letters), and CALMER (6 letters). All three words mean the same thing, but they each have slightly different connotations. SEDATER implies a more gradual transition from chaos to peace, while SERENER suggests a more permanent state of tranquility. CALMER is the most general of the three words, implying a decrease in intensity or agitation.