Translation of "unfailing" into Slovenian

Remember, he who created fearless birds is the Source of unfailing courage.

Ne pozabimo, on, ki je ustvaril neustrašne ptice, je vir neizčrpnega poguma.

My father always ran his haberdashery with unfailing politeness.

Moj oče je vodil galanterijo z neomajno vljudnostjo.

4:11) Indeed, true hope finds its basis in God’s unfailing purpose for mankind, and, therefore, this “hope does not lead to disappointment.”

4:11) Pravo upanje ima v resnici svojo osnovo v Božjem nezgrešljivem namenu za človeštvo in zato to upanje »ne bo razočaralo«.