Etymograph
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Indo-European
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ū
ton
ADV
Gratuitously, without a cause; gratis
+ Dat
Source:
https://bosworthtoller.com/5515
Attested
in
Aelfric's Colloquy 1
,
Aelfric's Colloquy 2
,
Aelfric's Colloquy 3
,
Aelfric's Colloquy 4