"pall : (transitive) To make vapid or insipid; to make lifeless or spiritless; to dull, to..."

“pall : (transitive) To make vapid or insipid; to make lifeless or spiritless; to dull, to weaken.
(intransitive) To become dull, insipid, tasteless, or vapid; to lose life, spirit, strength, or taste.”

- https://en.wiktionary.org/wiki/pall#English

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