inabarcable, incomprehensible
inaccesible, inaccessible
inagotable, inexhaustible
inalterable, impassible, unchanging, inalterable
inapelable, beyond appeal, without appeal
inapreciable, inestimable
inaudito, -a, unheard of
inavertido, -a, unnoticed; unwary, careless
incapaz, incapable
incásico, -a, pertaining to the Incas