(con)jugar

Question

¿Alguien sabe porque hay un cambio u-ue en jugar, pero no hay en conjugar? El verbo conjugar es regular e irregular al mismo tiempo, porque verbos con prefijos generalmente mantienen las mismas irregularidades. Ej. Poner, Suponer Ej. Vivir, Sobrevivir Ej. Volver, Revolver ¡Gracias!

Answer 1

My guess is there is a different etymological root for both words:

http://etimologias.dechile.net/?jugar < The etymology of jugar, I can't find the one of conjugar, but fortunately we have a word in Englsh which has the same latin root as it:

mid-15c., from L. conjugationem (nom. conjugatio) "a combining, connecting," noun of action from conjugare "to join together" (see conjugal). Grammatical sense is 1520s.

So that tells me that the two words are completely unrelated, they just happen to look like each other.