Illimitable a. : Incapable of being limited or bounded; immeasurable; limitless; boundless; as, illimitable space.

Example:
Why do we think that god made our feeble minds capable of understanding his Illimitable superior spirit?

Taxonomy
lim, Merriam-Webster Online Dictionary, Dictionary, webster, Word Games, Webster Online Dictionary with audio pronunciations, thesaurus, Google Search, Custom Search, glossary, english, language, ESL, Search, adjective, reaches, space and time, abil.

Defination from the web:
illimitable from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... incapable of being limited or bounded : measureless <the illimitable reaches of space and time> — il·lim·it·abil·i·ty -ˌli-mə-tə-ˈbi-lə-tē noun ...