ETYMOLOGY
possibly imitative (perhaps of the chattering of teeth)
EXAMPLE
“…Full gayly was that grete lorde . girde in the myddis,
A brighte belte of ble, . broudirde with fewles,
With drakes and with dukkes, . daderande tham semede,
For ferdnes of fawcons fete, . less fawked thay were…”
From: Winnere and Wastoure
(“Winner and Waster” is a Middle English poem written in alliterative verse around the middle of the 14th century)
Lexicophilia 