intone
Concise Oxford English Dictionary © 2008 Oxford University Press:
intone /ɪnˈtəʊn/
▶verb say or recite with little rise and fall of the pitch of the voice.
– derivatives
intoner noun.
intoner noun.
– origin C15 (orig. as entone): from OFr. entoner or med. L. intonare, from in- ‘into’ + L. tonus ‘tone’.
'intone' also found in these Oxford entries:

