שְׁמֵן ch. same. Ithpa. - אִשְׁתַּמֵּן to grow fat. Gen. R. s. 28 אמר ליה זיל ואש׳ … ומִשְׁתַּמֵּן וכ׳ he said to the bird, go and grow fat, and come again, and it went and grew fat, and came again; Yalk. Zeph. 566.