Compositional etymology. The assumed etymon has the structure V-Adv., which does not exist among Greek compounds, whereas other competing etymologies (θοῦρος / θοῶς + ὀρούω and θοῦρος / θείως + ὀρούω) have the structure Adv-V, which is indeed attested in Greek. This illustrates the complete insensitivity of Greek etymologists to the question of the internal syntax of compounds. The second member of the compound is the comparative of ῥᾴδιος, probably used here with the intensive meaning "rather, much" which goes along with the absolute use of the comparative