Below are possible answers for the crossword clue (Over-)serious.
7 letter answer(s) to (over-)serious
EARNEST
characterized by a firm and humorless belief in the validity of your opinions; "both sides were deeply in earnest, even passionate"; "an entirely sincere and cruel tyrant"; "a film with a solemn social message"
earnest; "one's dearest wish"; "devout wishes for their success"; "heartfelt condolences"
not distracted by anything unrelated to the goal
Serious, straight-faced, humourless
something of value given by one person to another to bind a contract
Other crossword clues with similar answers to '(Over-)serious'