a. Sc. Also ston-, stunkerd, stonkard, -art. [Of obscure origin.] Sulky, sullen.

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1737.  A. Ramsay, in Gentl. Mag., VII. 507/1. These stonkerd fellows Wha merit naithing but the gallows.

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1814.  Saxon & Gael, I. 77 (Jam.). I was speerin’ for you at my Lord, but he is sae stunkard and paughty.

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1824.  Scott, Redgauntlet, ch. ii. It’s a sore thing to see a stunkard cow kick down the pail when it’s reaming fou.

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