All 5 Uses

congenial
in
The Return of the Native
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But, if congenial to philosophy, it is apt to be dangerous to the commonwealth.†
Chpt 1 *

congenial = agreeable or compatible
Rejected suitors take to roaming as naturally as unhived bees; and the business to which he had cynically devoted himself was in many ways congenial to Venn.†
Chpt 1
Suppose he should become blind, or, at all events, never recover sufficient strength of sight to engage in an occupation which would be congenial to her feelings, and conduce to her removal from this lonely dwelling among the hills?†
Chpt 4
She had used to think of the heath alone as an uncongenial spot to be in; she felt it now of the whole world.†
Chpt 5

uncongenial = not agreeable or compatible

standard prefix: The prefix "un-" in uncongenial means not and reverses the meaning of congenial. This is the same pattern you see in words like unhappy, unknown, and unlucky.
The noise of the wind over the heath was shrill, and as if it whistled for joy at finding a night so congenial as this.†
Chpt 5

congenial = agreeable or compatible

Definitions:

(1) (congenial)
agreeable or compatible in a positive way -- often in the context of being friendly and sociable
(2) (meaning too rare to warrant focus)