unpumpableadj.
/(ˌ)ʌnˈpʌmpəbl/, U.S. /ˌənˈpəmpəb(ə)l/ Not pumpable, that cannot be pumped (in various senses).
ΘΚΠ
the mind > mental capacity > knowledge > hiding, concealing from view > keeping from knowledge > [adjective] > unrevealing
uninstructing1632
uninstructive1666
unrevealing1763
unbetraying1788
unpumpable1831
1831 B. Disraeli Young Duke II. iii. xiv. 173 Arundel Dacre was proverbially unpumpable.
1888 S. Lane-Poole Stratford de Redcliffe I. 365 Some described him as ‘the most unpumpable of men’.
1900 H. James Let. 29 June (1984) IV. i. 149 The great fatal, incurable, unpumpable leak of one's poor sinking bark.
1943 Princeton Alumni Weekly 26 Mar. 12/2 These fellows, to whom a sensational story is meat and drink, have to keep their respective traps shut and remain unpumpable.
2005 Globe & Mail (Canada) (Nexis) 13 Oct. g13 Come high winds, rising water or unpumpable oil beneath the Saudi Arabian desert, the Highlander Hybrid is going to consume less gasoline than some subcompact automobiles.
This entry has been updated (OED Third Edition, December 2014; most recently modified version published online December 2021).
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adj.1831