All 4 Uses

yearn
in
To Build a Fire
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The dog was disappointed and yearned back toward the fire.†

yearned = strongly desired
It was not concerned in the welfare of the man; it was for its own sake that it yearned back toward the fire.†
*
And all the while the dog sat and watched him, a certain yearning wistfulness in its eyes, for it looked upon him as the fire-provider, and the fire was slow in coming.†

yearning = strongly desiring; or a strong desire
As the twilight drew on, its eager yearning for the fire mastered it, and with a great lifting and shifting of forefeet, it whined softly, then flattened its ears down in anticipation of being chidden by the man.†

Definitions:

(1) (yearn)
have a strong desire -- often for something difficult or impossible to have
(2) (meaning too rare to warrant focus)