What is etym: [Cf. Hum, interj.] To make an inarticulate sound, like h'm, through the nose in the process of speaking, from embarrassment or a affectation; to hem called?

hum — Etym: [Cf. Hum, interj.] To make an inarticulate sound, like h'm, through the nose in the process of speaking, from embarrassment or a affectation; to hem. (Webster's 1913.)