Calqued from German Mehrarbeit. <span class="searchmatch">surtravail</span> m (uncountable) Surplus labour “<span class="searchmatch">surtravail</span>”, in Trésor de la langue française informatisé [Digitized Treasury...
From supra- + muncă. Calque of French <span class="searchmatch">surtravail</span>. supramuncă f (uncountable) (Marxism) surplus labour...