Etymology Borrowed from Latin suffīxus (“suffix”), from sub- (“under”) + fīxus (perfect passive participle of fīgere (“to fasten, fix”)), equivalent to sub- + -fix.
The suffix "-able" changes "sing" into "singable".
The praenomen and nomen for the most part consisted of simple stems with the suffix -us or -ius, […]1945, E[lizabeth] G[idley] Withycombe, “Introduction”, in The Oxford Dictionary of English Christian Names, Oxford, Oxfordshire: Clarendon Press, →OCLC, page xiv:
1 more example
Before I simply create a root meaning X, is there any way I can use Ithkuil morphological categories or the 150 or so suffix categories to derive this word from a more general or primary word? […] In other words, the writer would not write or “key” a certain Ithkuil symbol, but rather would select a particular root from a database and identify the particular forms of the 22 morphological categories which apply to the root as well as any suffixes.2006, “Ithkuil Q & A”, in The Conlanger's Library, archived from the original on 14 Jan 2025, pages 3, 6:
Etymology Borrowed from Latin suffīxus (“suffix”), from sub- (“under”) + fīxus (perfect passive participle of fīgere (“to fasten, fix”)), equivalent to sub- + -fix.
1
To append (something) to the end of something else.