Able to be challenged or questioned; susceptible to being disputed or opposed.
Alternative spelling of challengable, using the -eable suffix variant (from -able). Both forms are grammatically correct, with -eable often appearing after consonants in certain phonetic contexts, though -able is more common.
The fact that we have two accepted spellings (challengable vs challengeable) is typical in English—we often add an extra 'e' to maintain pronunciation clarity, even though both spellings are understood.
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