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Webster 1913 Edition

Noun.

[For

sulkenness

, fr. AS.

solcen

slothful, remiss, in ā

solcen

, be

solcen

, properly p. p. of

sealcan

in ā

sealcan

to be weak or slothful; of uncertain origin.]

The quality or state of being sulky; sullenness; moroseness;

as,

sulkiness

of disposition

Noun.

[from sulky.] Sullenness; sourness; moroseness.

sulkiness ‎(countable and uncountable, plural sulkinesses)