From un- + smotherable. <span class="searchmatch">unsmotherable</span> (comparative more <span class="searchmatch">unsmotherable</span>, superlative most <span class="searchmatch">unsmotherable</span>) (figurative) unquenchable 1836 March – 1837 October...
Pickwick Club, London: Chapman and Hall, […], published 1837, →OCLC: the <span class="searchmatch">unsmotherable</span> delight of all the porters and by - standers 1954 February, Trevor Holloway...