Encara no tenim significats per a "grim playfulness".
1She looked back, her face wrinkling into one of those strangely unbecoming expressions of grim playfulness.
2The old man poked his long bony finger In the direction of his son's ribs with grim playfulness.
3Bezers continued with grim playfulness.
4"I see that you want to tell Peter Ivanovitch something in my favour," said Razumov, with grim playfulness.
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