intone in WordNet English dictionary

1. recite with musical intonation; recite as a chant or a psalm
   "The rabbi chanted a prayer"
   chant  intone  intonate  cantillate 
   
2. utter monotonously and repetitively and rhythmically
   "The students chanted the same slogan over and over again"
   tone  chant  intone 
   
3. speak carefully, as with rising and falling pitch or in a particular tone
   "please intonate with sadness"
   intonate  intone