Mid 19th century; earliest use found in Alfred Tennyson (1809–1892), poet. From classical Latin reboant-, reboāns, present participle of reboāre to re-echo, resound, to call or cry in answer from re- + boāre to bellow.
Definition of reboant in US English:
reboant
adjectiverɪˈbəʊənt
literary, poetic
Resounding, reverberating; loudly echoing.
Origin
Mid 19th century; earliest use found in Alfred Tennyson (1809–1892), poet. From classical Latin reboant-, reboāns, present participle of reboāre to re-echo, resound, to call or cry in answer from re- + boāre to bellow.