immaniter
immensus
im·mar·ces·ci·bi·lis
unfading
Similar to immarcescibilis
implacabilis
–
unappeasable
indicibilis
–
indescribable, inexpressible
imbellis
–
unwarlike
immortalis
–
immortal
inedicibilis
–
inexpressible
impenetrabiilis
–
impenetrable
stabilis
–
firm, stable, steadfast