He was succumbing to irresistible, youthful, childish drowsiness.
Sonya did not succumb to the tender tone Natasha used toward her.
When he was informed that among others awaiting him in his reception room there was a Frenchman who had brought a letter from his wife, the Countess Helene, he felt suddenly overcome by that sense of confusion and hopelessness to which he was apt to succumb.
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Everyone insisted she attend and she finally succumbed.
She predicted that 40% of Atlantic salmon would succumb to the disease.