Synonym word of most unsmiling:

cold sober, deadpan, dignified, dour, dull, earnest, grim, grim-faced, heavy, leaden, long-faced, meaningful, muted, no-nonsense, ponderous, quiet, sad, sage, saturnine, sedate, sober, solemn, somber, staid, strictly business, subdued, thoughtful, unsmiling


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Synonyms:  A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Popular