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Webster 1913 Edition
Swarth
Webster 1828 Edition
Swarth
SWARTH
, sworth, a.1.
Being of a dark hue; moderately black; tawny. A nation strange with visage swart.
[I believe swart and swarth are never used in the United States, certainly not in New England. Swarthy is a common word.]
2.
Gloomy; malignant. [Not in use.]