Stoop
Old English stūpian (verb), of Germanic origin; related to the adjective steep1. Both senses of the noun date from the late 16th century.
wiktionary
Borrowed from Dutch stoep(“platform", "pavement”). Doublet of stoep. Cognate with step.
From Middle English stoupen, from Old English stūpian(“to bow, bend”), from Proto-West Germanic *stūpōn, from Proto-Germanic *stūpōną, *stūpijaną(“to stand out”), from Proto-Indo-European *(s)tewb-(“to push, butt, knock”). Compare steep. Cognate with Dutch stuipen(“to bend the upper part of the body forward and downward”), Old Norse stúpa(“to stoop”). Related also to Old Frisian stēpa(“to help”), Old Norse steypa(“to cause to stoop, cast down, overthrow”).
From Middle English stoupe, stulpe, from Old Norse stólpi(“post, pillar”), from Proto-Germanic *stulpô.
From Middle English stope, stoupe, from Old Norse staup(“dip, well, cup”), from Proto-Germanic *staupą. Related to Old English stēap(“drinking vessel, cup, flagon, stoop”).
etymonline
stoop (v.)
"bend forward," Old English stupian "to bow, bend," from Proto-Germanic *stup- (source also of Middle Dutch stupen "to bow, bend," Norwegian stupa "fall, drop"), from PIE *(s)teu- (1) "to push, stick, knock, beat" (see steep (adj.)). Figurative sense of "condescend," especially expressing a lowering of the moral self, is from 1570s. Sense of "swoop" is first recorded 1570s in falconry. Related: Stooped; stooping. The noun meaning "an act of stooping" is from c. 1300. Stoop-shouldered attested from 1773.
stoop (n.)
"raised open platform at the entrance of a house," 1755, American and Canadian, from Dutch stoep "flight of steps, doorstep, threshold," from Middle Dutch, from Proto-Germanic *stap- "step" (see step (v.)).
This, unlike most of the words received [in American English] from the Dutch, has extended, in consequence of the uniform style of building that prevails throughout the country, beyond the bounds of New York State, as far as the backwoods of Canada. [Bartlett]
Also in South African English as stoep.
