soberest
形容词 sober:
not affected by a chemical substance (especially alcohol)
同义词:sober
dignified and somber in manner or character and committed to keeping promises
同义词:grave, sedate, sober, solemn
lacking brightness or color; dull
同义词:drab, sober, somber, sombre
completely lacking in playfulness
同义词:unplayful, serious, sober