in ‧ tone /ɪnˈtəʊn $ -ˈtoʊn/ BrE AmE verb [transitive] formal
[ Date: 1300-1400 ; Language: Old French ; Origin: entoner , from Medieval Latin intonare , from Latin tonus ; ⇨ ↑ tone 1 ]
to say something slowly and clearly without making your voice rise and fall much as you speak:
The priest intoned the blessing.