1. the willow tree ...1564 obs.
2. also 'RIG' - the smallest or weakest of a litter, brood, or family;
the youngest or feeblest of a family; a weak, puny child ...1805 Sc.
to wriggle, to writhe ...Bk1854 Eng. dial.
n. 1. ? from werg (n. a willow)
n. 2. of unknown origin
FIRST DOCUMENTED USE
1564 - see EXAMPLE below
"...[The tenant may take] boowes of the wrigges to make stakes..for the mentayning of the mowndes..."
From: Assignment of Lease, 1564 (Brasenose College, Oxford Archives)