The word 'steepest' is correct and usable in written English.
You can use it when describing the angle or slope of something, typically a road, hill, or mountain. Example: "The steepest part of the hike was the final ascent to the summit."
Dashing hopes that the steepest decline in growth since the 1930s might be nearing an end, the Office for National Statistics said gross domestic product – the total value of goods and services in the economy – fell by 0.8% in the three months to June.
Owen Bowcott The environment department has already suffered some of the steepest cuts across Whitehall, with a 30% cut in 2010 against the government average of 19%, followed by a further 10% in 2013, leaving observers wondering what's left to axe.
You can take a creaking funicular up the steepest slopes (the fare is 100 pesos, around 10p) or, if you walk, pause for breath on the climb and turn to see the pink, lemon, lime and ochre houses standing in contrast to the blue of the sky and deep indigo of the ocean.
They're not necessarily the steepest or highest, but they're the most outrageous".
But the daft 33% gradient is going to push the riders to their limit: it's the steepest climb of any section on the whole Tour de France route, according to Sheffield council.
The steepest recession on the American mainland, a plague of H1N1 swine flu and a deepening war against organised crime had made the preceding few years fairly grim.
But the pace at which it does so will slow as the BRICs put the days of their steepest ascent behind them.Take a deep breathThe emerging economies' share of output is no longer rising as fast as it did in the 2000s.
The recession in 2008-09 wastillll the steepest in Britain since current records began in 1948.In this section Politics this week Business this week KAL's cartoon ReprintsPut the handbags awayAn agreement was reached in an acrimonious four-year dispute over the stake that LVMH, a big French luxury-goods company, accumulated in Hermès, a smaller rival.
In Tokyo and Osaka, where the rise had been steepest, property prices have now fallen by at least 70% from their peak.Then there is life insurance, which at least seems to offer a guaranteed fixed rate of interest, plus a bit more in good years.
Mexico's economy recently suffered the steepest recession in the Americas, shrinking 9.7% in the year to June 2009.
Thanks to its wide-open economy and high exposure to the United States it suffered the steepest recession on the American mainland: in 2009 its economy shrank by 6%.
