(comparative more unascertainable, superlative most unascertainable)
From un- + ascertainable.
"unascertainable." YourDictionary, n.d. Web. 24 September 2018. <http://www.yourdictionary.com/unascertainable>.
unascertainable. (n.d.). Retrieved September 24th, 2018, from http://www.yourdictionary.com/unascertainable
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