steep
adjective
uk/stiːp/ ussudden and very big:
steep decline/drop/fall With the steep fall in the price of oil, the economy has slowed significantly.
steep rise/increase The property market is beginning to decline after years of steep price increases.
very high or higher than is reasonable:
steep fee/charge/cost Investors are concerned about the steep cost of the banking bail-out.
Co-operatives could soon face steep taxes.