Asservir
Verb "asservir" (to enslave) means "to reduce to the state of slave, of great dependence". Contrary to what you might think, this verb is not conjugated on the model of "servir" but on "finir" model. Indeed, "asservir" is a verb of the second group. For proof, we say "en asservissant". There is no irregularity in its conjugation.
j'asservis
tu asservis
il asservit
nous asservissons
vous asservissez
ils asservissent