approbation

approval or praise

Roots

ad- / a-: to, toward, added onto, or intensified
prob: test, prove, approve, or worth

Other words with the prob root

probable: likely to be true or happen
probity: honesty and moral uprightness
prove: to show that something is true
reprobate: morally unprincipled person

Approbation is approval after something passes the test.

The proposal received quiet approbation from the board.

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