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Use "somnolency" in a sentence
"Mrs. Gary and Mrs. Fish he found sunk in somnolency at the foot of the tree where they had been talking."
"The jangling of the doctors and friars whom Rowena brought together did not in the least enliven him, and he would sometimes give proofs of somnolency during their disputes, greatly to the consternation of his lady."
"According to some authorities, the fat produces the carbon that in some way tends to induce somnolency."