indiscussible

or in·dis·cuss·a·ble

[in-di-skuhs-uh-buh l]

adjective

unsuitable for or not subject or open to discussion; not negotiable.

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Origin of indiscussible

First recorded in 1890–95; in-³ + discussible

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018