Intone (?), v. t. [imp. & p. p. Intoned (?); p. pr. & vb. n. Intoning.] [LL. intonare, intonatum; pref. in- in + L. tonus tone. See Tone and cf. Entune, Intonate.] 1. To utter with a musical or prolonged note or tone; to chant; as, to intone the church service.
[1913 Webster]

2. To speak with a distinctive or unusual tone in the voice, or in a monotone; as, the professor intoned his lectures as though by rote.
[PJC]