In the alistano-sanabres language, it means to be fallow. In the old crop ( for some decades ) It was customary to plant cereal to two sheets, i.e., the end of the village was divided into two parts or leaves alternating annually: one is planted and the other rested. That rested was said that it was adil. It is also adil terrain that has planted more than one year. Now almost all of the land of peoples is adil, full of Cistus, thyme, oak, broom...