unsearchable

From Middle English unserchable, equivalent to un- +‎ searchable.

• (UK) IPA^(key): /ʌnˈsəːtʃəb(ə)l/

unsearchable (comparative more unsearchable, superlative most unsearchable)

1. That cannot be investigated or searched into; unknowable, inscrutable.
   • 1621, Democritus Junior [pseudonym; Robert Burton], The Anatomy of Melancholy, Oxford: Printed by Iohn Lichfield and Iames Short, for Henry Cripps, OCLC 216894069; The Anatomy of Melancholy: […], 2nd corrected and augmented edition, Oxford: Printed by John Lichfield and James Short, for Henry Cripps, 1624, OCLC 54573970, partition II, section 3, member 3:

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

   • 1971, Keith Thomas, Religion and the Decline of Magic, Folio Society 2012, p. 103:

     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. (computing) Not capable of being searched; on which one cannot perform a search.

• searchable

• unreachables