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Indo-European
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> r
o
ccian
move to and fro, to rock
Source:
Kroonen 2013
:417
originates from: PGmc
*rukkōn-
"move to and fro, to rock" (rukkōn-
>
rukkōjan
>
rokkōjan
>
rokkian) through pgmc-to-oe
(source:
Kroonen 2013
:417)