unsearchable

adj

1. (archaic)That cannot be searched or investigated into; inscrutable, unknowable.

   “He chastiseth and corrects, as to Him seems best, in His deep, unsearchable, and secret judgment, and all for our good.”

   “Oh, the depth of the riches of the wisdom and / knowledge of God! / How unsearchable his judgments, / and his paths beyond tracing out!”

   “So intricate, ſo anfractuous, ſo unſearchable are the vvays of Providence.”

   “Preachers warned […] that although God might sometimes make the meaning of his judgements clear they were normally unsearchable.”

2. That cannot be sought out or looked for.
3. (Internet)Not capable of being searched; on which one cannot perform a search.

   “"Having a band name like that makes me totally unsearchable," says Rhode Island artist Λ, explaining that his name is pronounced "arc", "but I like how using symbols means favouring an aesthetic choice over a more practical one.[…]"”

noun

1. That which is unknowable.

   “That there should be two unsearchables in the universe, that God should be one and man the other, would confer great dignity and honour upon us men were it not for the humiliating fact that it is our deceitfulness that renders us an inscrutable problem to all but God.”