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hum 1 , v.i. make low inarticulate vocal sound, esp. (usu. ~ sing with closed lips; (colloq.) be in state of activity, as make things ~; (si.) smell un pleasantly; (v.t.) utter, sing, with closed lips. ME, imit.; so MHG hummen hum 2 , n. Humming sound esp. of hesitation (usu. ~s and ha's applause, surprise, etc.; (si.) bad smell, imit. hum 3 (hem), int. expr. hesitation, dissent, etc. hum 4 , n. (s i) . Sham, hoax. =HUMBUG
Geoffrey Bennington (Fri,) studied this question.
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