A verb appearing in The Etymologies of the 1930s as ath-rado “to cross, traverse”, clearly a combination of N. ath- “cross” and N. rada- “make a way” (Ety/RAT).

Neo-Quenya: I recommend against using the prefix N. ath- “cross” since its etymology seems to have been abandoned, but I would retain athrada- “cross, traverse” for purposes of Neo-Sindarin as an elaboration of athra- “cross (to and fro)”. I would use it for crossing in a single direction, as in i adan athrada i eryn “the man crosses the mountains [one way]”.