Steep
Old English stēap ‘extending to a great height’, of West Germanic origin; related to steeple and stoop1.
wiktionary
From Middle English steep, from Old English stēap(“high”), from Proto-Germanic *staupaz. Compare Old Frisian stāp, Dutch stoop(“grand; proud”), Middle High German stouf(“towering cliff, precipice”), Middle High German stief(“steep”)), from Proto-Indo-European *(s)tewb-(“to push, stick”). [1] The Proto-Indo-European root (and related) has many and varied descendants, including English stub; compare also Scots stap(“to strike, to forcibly insert”).
The sense of “sharp slope” is attested circa 1200; the sense “expensive” is attested US 1856. [1]
From Middle English stepen, from Old Norse steypa(“to make stoop, cast down, pour out, cast (metal)”) [2] [3], from Proto-Germanic *staupijaną(“to tumble, make tumble, plunge”), from Proto-Indo-European *(s)tewb-(“to push, hit”). Cognate with Danish støbe(“cast (metal)”), Norwegian støpe, støype, Swedish stöpa(“to found, cast (metal)”), Old English stūpian(“to stoop, bend the back, slope”). Doublet of stoop.
etymonline
steep (adj.)
"having a sharp slope," Old English steap "high, lofty; deep; prominent, projecting," from Proto-Germanic *staupa- (source also of Old Frisian stap "high, lofty," Middle High German *stouf), from PIE *steup-, extended form of root *(s)teu- (1) "to push, stick, knock, beat," with derivations referring to projecting objects (source also of Greek typtein "to strike," typos "a blow, mold, die;" Sanskrit tup- "harm," tundate "pushes, stabs;" Gothic stautan "push;" Old Norse stuttr "short"). The sense of "precipitous" is from c. 1200. The slang sense "at a high price" is a U.S. coinage first attested 1856. Related: Steeply; steepness. The noun meaning "steep place" is from 1550s.
steep (v.)
"to soak in a liquid," early 14c., of uncertain origin, originally in reference to barley or malt, probably cognate with Old Norse steypa "to pour out, throw" (perhaps from an unrecorded Old English cognate), from Proto-Germanic *staupijanan. Related: Steeped; steeping.
