Expensive : costing a lot of money.Compact : closely and neatly packed together, dense.Concrete : existing in a material or physical form; not abstract.Abstract : existing in thought or as an idea but not having a physical or concrete existence.Narrow : of small width in relation to length, limited in extent, amount, or scope.Extensive : covering or affecting a large area, large in amount or scale.Antonym of Extensive is Narrow.