uttered in a monotonous cadence or rhythm as in chanting
Filled with repetition, especially needless or tedious repetition.
The definition of tiresome is something tedious, boring or exceedingly dull.
Not clear or resonant:
Find another word for singsong. In this page you can discover 9 synonyms, antonyms, idiomatic expressions, and related words for singsong, like: sing-song, chantlike, intoned, repetitious, monotonous, singalong, , tiresome and dull.