drowsy and dull ...1847 Eng. dial.
a drowsy, stupid state of body or mind
...Bk1825 Eng. dial. (Somersetshire)
• ? Anglo-Saxon swodrian to get drowsy, to fall asleep
• ? Middle Dutch has swadderen to be weary with drinking
or to stagger with drunkenness
• ? Jennings in 'Observations on Some of the Dialects in the West..." suggests it is derived from sudor a sweat
FIRST DOCUMENTED USE
1825 - Zwodder. a drowsy and stupid state of body or mind
From: Observations on Some of the Dialects in the West of England, particularly Somersetshire, etc.
By: James Jennings, 1825
"...We simmed to skeer droo Sparkvurd like
A ship out on the water;
Thik putt did sim to eche along
As mid be in a zwodder."
From: Somerset Folk Series, 1922
• A Dictionary of Archaic and Provincial Words, James Halliwell, 1847
• Observations on Some of the Dialects in the West of England,
particularly Somersetshire, etc., James Jennings, 1825
• The English Dialect Dictionary, Joseph Wright, 1898-1905