Encara no tenim significats per a "sudden grimness".
1All the sudden grimness had gone out of his face.
2Then, with sudden grimness: Sit down, Hardwick.
3"I don't think you would have cared for its DENOUEMENT," he said with sudden grimness.
4"Well," she said with a sudden grimness, "I hope it'll be all right about the rent, that's all."
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