The Collaborative International Dictionary
Impetrable
Impetrable \Im"pe*tra*ble\a. [L. impetrabilis: cf. F.
imp['e]trable. See Impetrate.]
Capable of being obtained or moved by petition. [Obs.]
--Bailey.
Wiktionary
impetrable
a. (context obsolete English) Capable of being obtained or influenced by petition.