sado-

From the name of the Marquis de Sade, initially used to form words like sadism and later extrapolated into a prefix.

sado-

1. sadism

   sadomasochism, sadopopulism, sadostate, sadosociety, sadoasceticism, sadoreligion, sadospiritual

• 2011 July 7, Philip Durkin, The Oxford Guide to Etymology, OUP Oxford, →ISBN, page 109:

  Very occasionally similar formations are found on bases not ultimately of Latin or Greek origin, as for instance sado- (in sadomasochism, etc.), formed on the name of the Marquis de Sade, albeit on the model of earlier formations with derivative suffixes such as sadism, sadistic, etc. There would perhaps be a case for saying that, in spite of its having the connecting vowel -o-, sado- is actually a prefix, not a true combining form, since it is found only in formations with an independent word as second element, not another bound form, although this would conflict with the fact that it clearly has lexical content in formations such as sadomasochism.)

• 2018 October 10, Christopher D. Rodkey, Jordan E. Miller, The Palgrave Handbook of Radical Theology, Springer, →ISBN, page 161:

  More specifically, patriarchy is a sado-religion, "a worship of a sadiswt god; religion charactized by bondage and discipline, dominance and submission, and the forcing of women to their knees". Sado-religion employs symbols—that is, sado-symbolism—as the vehicle […] Her use of "sado" as prefix is a revealing, helpful Spell offered to “[a]ny Crone... to compose such words whenever she deems... necessary or appropriate” (224). Some of these words include sado-euphemism, sadofeminism, sado-hagiography, sadosociety, sadostate, and sado-ritual syndrome (94, 224).

• AOSD, ados, DAOs, daos, odas, soda, Soda, ADOS, dosa