Antonyms of adj clownish

1 sense of clownish

Sense 1
buffoonish, clownish, clownlike, zany -- (like a clown; "a buffoonish walk"; "a clownish face"; "a zany sense of humor")

INDIRECT (VIA humorous) -> humorless, humourless, unhumorous -- (lacking humor; "it was a humorless wink; a wink of warning"- Truman Capote)

Similarity of adj clownish

1 sense of clownish

Sense 1
buffoonish, clownish, clownlike, zany -- (like a clown; "a buffoonish walk"; "a clownish face"; "a zany sense of humor")
       => humorous (vs. humorless), humourous -- (full of or characterized by humor; "humorous stories"; "humorous cartoons"; "in a humorous vein")