enormous

extraordinarily large in size or extent or amount or power or degree; "an enormous boulder"; "enormous expenses"; "tremendous sweeping plains"; "a tremendous fact in human experience; that a whole civilization should be dependent on technology"- Walt

यूआई पुनर्लेखन, बहुत सारे कोड साफ सफाई तथा सुधार

An enormous amount was spent on the construction of the dam.