Webster's Revised Unabridged Dictionary · 1913

Blatter

Blatter ({not transcribed}) , intransitive verb

[Latin blaterare to babble: compare French blatérer to bleat.]

To prate; to babble; to rail; to make a senseless noise; to patter. [Archaic]
The rain blattered. — Jeffrey
They procured... preachers to blatter against me,... so that they had place and time to belie me shamefully. — Latimer