etimología:

las palabras castellanas "trabajo" y "trabajar", del castellano antiguo trebejare (esfuerzo, esforzarse), no derivan de la usual latina labor (que da las castellanas "labor" y "laborar"), sino de una tortura de la antigua roma cuyo nombre era tripalĭum (tres palos) y del verbo tripaliāre (torturar o torturarse).[1

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etymology:

the spanish word "trabajo" and "trabajar" (to work), from old castilian trebejare (effort, to make an effort), don't come from the latin word labor (which in spanish become "labor" and "laborar"), but from a torture from antique rome which name was tripalium (three sticks) and from the verb tripalare (to torture or torture oneself)