sober

cause to become sober; "A sobering thought"

become more realistic; "After thinking about the potential consequences of his plan, he sobered up"

become sober after excessive alcohol consumption; "Keep him in bed until he sobers up"

not affected by a chemical substance (especially alcohol)

dignified and somber in manner or character and committed to keeping promises; "a grave God-fearing man"; "a quiet sedate nature"; "as sober as a judge"; "a solemn promise"; "the judge was solemn as he pronounced sentence"

lacking brightness or color; dull; "drab faded curtains"; "sober Puritan grey"; "children in somber brown clothes"

completely lacking in playfulness