drop-off
drop-off ▶noun 1 a decline or decrease: a sudden drop-off in tourism. 2 a sheer downward slope; a cliff: dizzy drop-offs on either side.
drop-off |ˈdrɒpɒf | ▶noun 1 a decline or decrease: a sudden drop-off in tourism. 2 N. Amer. a sheer downward slope; a cliff: dizzy drop-offs on either side.