Room
Old English rūm, of Germanic origin; related to Dutch ruim, German Raum .
wiktionary
From Middle English roum, from Old English rūm(“room, space”), from Proto-West Germanic *rūm(“room”), from Proto-Germanic *rūmą(“room”), from Proto-Indo-European *rowə-(“free space”). Cognate with Low German Ruum, Dutch ruimte(“space”) and Dutch ruim(“cargo load”), German Raum(“space, interior space”), Danish rum(“space, locality”), Norwegian rom(“space”), Swedish rum(“space, location”), and also with Latin rūs(“country, field, farm”) through Indo-European. More at rural.
It is ostensibly an exception to the Great Vowel Shift, which otherwise would have produced the pronunciation /ɹaʊm/, but /aʊ/ does not occur before noncoronal consonants in Modern English.
From Middle English roum, rom, rum, from Old English rūm(“roomy, spacious, ample, extensive, large, open, unencumbered, unoccupied, temporal, long, extended, great, liberal, unrestricted, unfettered, clear, loose, free from conditions, free from occupation, not restrained within due limits, lax, far-reaching, abundant, noble, august”), from Proto-Germanic *rūmaz(“roomy, spacious”), from Proto-Indo-European *rewh₁-(“free space”). Cognate with Scots roum(“spacious, roomy”), Dutch ruim(“roomy, spacious, wide”), Danish rum(“wide, spacious”), German raum(“wide”), Icelandic rúmur(“spacious”).
From Middle English rome, from Old English rūme(“widely, spaciously, roomily, far and wide, so as to extend over a wide space, liberally, extensively, amply, abundantly, in a high degree, without restriction or encumbrance, without the pressure of care, light-heartedly, without obstruction, plainly, clearly, in detail”). Cognate with Dutch ruim(“amply”, adverb).
room ( uncountable)
etymonline
room (n.)
Middle English roum, from Old English rum "space, extent; sufficient space, fit occasion (to do something)," from Proto-Germanic *ruman (source also of Old Norse, Old Saxon, Old High German, Gothic rum, German Raum "space," Dutch ruim "hold of a ship, nave"), nouns formed from Germanic adjective *ruma- "roomy, spacious," from PIE root *reue- (1) "to open; space" (source also of Avestan ravah- "space," Latin rus "open country," Old Irish roi, roe "plain field," Old Church Slavonic ravinu "level," Russian ravnina "a plain").
Old English also had a frequent adjective rum "roomy, wide, long, spacious," also an adverb, rumlice "bigly, corpulently" (Middle English roumli).
The meaning "chamber, cabin" is recorded by early 14c. as a nautical term; applied by mid-15c. to interior division of a building separated by walls or partitions; the Old English word for this was cofa, ancestor of cove. The sense of "persons assembled in a room" is by 1712.
Make room "open a passage, make way" is from mid-15c. Room-service is attested from 1913; room-temperature, comfortable for the occupants of a room, is so called from 1879. Roomth "sufficient space" (1530s, with -th (2)) now is obsolete.
room (v.)
"to occupy a room or rooms" (especially with another) as a lodger," by 1825 (implied in roomed), from room (n.). Related: Rooming. Rooming-house, "house which lets furnished apartments," is by 1889, according to OED "chiefly U.S." In Old English (rumian) and Middle English the verb meant "become clear of obstacles; make clear of, evict."
