inexplainableadj.
/ɪnɛkˈspleɪnəb(ə)l/ rare.
That cannot be explained; inexplicable.
ΘΚΠ
the mind > mental capacity > intelligibility > unintelligibility > inexplicableness > [adjective]
unplitable?c1425
unexplicable1532
inexplicable1546
subtle1547
irresolute1574
subtile1582
undissoluble1587
incomprehensible1604
unexpoundable1611
unfoldable1611
inexplainable1623
unsalvable1624
uninterpretable1625
indissolvable1637
unaccountable1643
inaccountable1647
unexplainablea1711
undecipherable1757
irresolvable1785
indecipherable1853
unconstruable1856
inconstruable1874
unravellable1881
1623 H. Cockeram Eng. Dict. Inexplanable, that cannot be explaned.
1861 M. Oliphant Last of Mortimers (1862) vi. xv. 254 It was a dread, inexplainable pause.
1899 Daily News 3 July 7/2 One very curious phenomenon recorded by all the diagrams..is at present wholly inexplainable.
This entry has not yet been fully updated (first published 1900; most recently modified version published online March 2018).
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adj.1623