"intone" in the verb sense
1. tone, chant, intone
utter monotonously and repetitively and rhythmically
"The students chanted the same slogan over and over again"
2. chant, intone, intonate, cantillate
recite with musical intonation recite as a chant or a psalm
"The rabbi chanted a prayer"
3. intonate, intone
speak carefully, as with rising and falling pitch or in a particular tone
"please intonate with sadness"
Source: WordNet® (An amazing lexical database of English)
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