Extremely wide (4)
I believe the answer is:
vast
(Other definitions for vast that I've seen before include "Gigantic" , "Extremely large or extensive" , "Of very great extent" , "Unusually great" , "Huge, enormous" .)
I believe the answer is:
vast
(Other definitions for vast that I've seen before include "Gigantic" , "Extremely large or extensive" , "Of very great extent" , "Unusually great" , "Huge, enormous" .)