Syllables are dropped or repeated, speech finally becomes undistinguishable.

Joanna coloured until the red stain became undistinguishable, and even Polly felt conscious that her allusion was too flippant for the cause.

He would even pray sometimes in measured lines, and go on murmuring petitions, till the words of the murmur became undistinguishable, and he fell asleep.

Beyond, all detail became undistinguishable through the distance, for the north side of the Rito turned into a dim yellowish wall crowned by dark pine-timber.