This word is acceptable for play in the UK dictionary that is being used in the following games:

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adj. That cannot be ascertained; uncertain, unable to be determined or discovered.

Not capable of being ascertained; incapable of being certainly known.

adj. not able to be ascertained; resisting discovery

"In his questioning of Osterhaus, Shepherd asked whether DCF had a means to determine whether prospective adoptive parents are susceptible to mental illness, drug abuse or domestic violence -- or whether such risks were '' unascertainable. ''"

indeterminable    undeterminable   

ascertainable   

indeterminable   

torchy    unobservable    baby-talk    knowable    full-voiced