Antonyms of adj openmouthed

1 sense of openmouthed

Sense 1
goggle-eyed, openmouthed, popeyed -- (with eyes or mouth open in surprise)

INDIRECT (VIA surprised) -> unsurprised, not surprised -- (not surprised or expressing surprise; "that unsuprised obstinate look on his face")

Similarity of adj openmouthed

1 sense of openmouthed

Sense 1
goggle-eyed, openmouthed, popeyed -- (with eyes or mouth open in surprise)
       => surprised (vs. unsurprised) -- (taken unawares or suddenly and feeling wonder or astonishment; "surprised by her student's ingenuity"; "surprised that he remembered my name"; "a surprised expression")