babble

Short definition from Wiktionary

Verb

1. 1
   To utter words indistinctly or unintelligibly; to utter inarticulate sounds
2. 2
   To talk incoherently; to utter meaningless words.
3. 3
   To talk too much; to chatter; to prattle.
4. 4
   To make a continuous murmuring noise, like shallow water running over stones.
5. 5
   To utter in an indistinct or incoherent way; to repeat words or sounds in a childish way without understanding.
6. 6
   To reveal; to give away (a secret).

Noun

1. 1
   Idle talk; senseless prattle
2. 2
   Inarticulate speech; constant or confused murmur.
3. 3
   A sound like that of water gently flowing around obstructions.