Webster's Revised Unabridged Dictionary · 1913

Investigable

Investigable , adjective

[Latin investigabilis. See Investigate.]

Capable or susceptible of being investigated; admitting research. — Hooker

Investigable , adjective

[Latin investigabilis. See In- not, and Vestigate.]

Unsearchable; inscrutable. [Obsolete]
So unsearchable the judgment and so investigable the ways thereof. — Bale