Both Uses

renounce
in
Utopia, by Thomas More
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for they think it the maddest thing in the world to pursue virtue, that is a sour and difficult thing, and not only to renounce the pleasures of life, but willingly to undergo much pain and trouble, if a man has no prospect of a reward.†

renounce = formally reject, give up, or turn away from
But they think it madness for a man to wear out the beauty of his face or the force of his natural strength, to corrupt the sprightliness of his body by sloth and laziness, or to waste it by fasting; that it is madness to weaken the strength of his constitution and reject the other delights of life, unless by renouncing his own satisfaction he can either serve the public or promote the happiness of others, for which he expects a greater recompense from God.†
*

renouncing = formally rejecting, giving up, or turning away from

Definitions:

(1) (renounce)
to formally reject, give up, or turn away from

(as in to give up the power of a monarch, to change belief, behavior, support, or association)
(2) (meaning too rare to warrant focus)