Bed
Old English bed, bedd (noun), beddian (verb), of Germanic origin; related to Dutch bed and German Bett .
wiktionary
From Middle English bed, bedde, from Old English bedd(“bed, couch, resting-place; garden-bed, plot”), from Proto-Germanic *badją(“plot, grave, resting-place, bed”). Cognate with North Frisian baad, beed(“bed”), Low German Bedd, Dutch bed(“bed”), German Bett(“bed”), Swedish bädd(“bed”), Icelandic beður(“bed”).
The Proto-Germanic term may in turn be from Proto-Indo-European *bʰedʰ-(“to dig”) with various theories explaining the development in meaning. If it is, the term is also cognate with Ancient Greek βοθυρος(bothuros, “pit”), Latin fossa(“ditch”), Latvian bedre(“hole”), Welsh bedd(“grave”), Breton bez(“grave”); and probably also Russian бодать(bodatʹ, “to butt, to gore”).
etymonline
bed (n.)
Old English bedd "bed, couch, resting place; garden plot," from Proto-Germanic *badja- "sleeping place dug in the ground" (source also of Old Frisian, Old Saxon bed, Middle Dutch bedde, Old Norse beðr, Old High German betti, German Bett, Gothic badi "bed"), sometimes said to be from PIE root *bhedh- "to dig, pierce" (source also of Hittite beda- "to pierce, prick," Greek bothyros "pit," Latin fossa "ditch," Lithuanian bedu, besti "to dig," Breton bez "grave"). But Boutkan doubts this and writes, "there is little reason to assume that the Gmc. peoples (still) lived under such primitive circumstances that they dug out their places to sleep."
Both the sleeping and gardening senses are found in Old English; the specific application to planting is found also in Middle High German and is the only sense of Danish bed. Meaning "bottom of a lake, sea, or watercourse" is from 1580s. Geological sense of "a thick layer, stratum" is from 1680s.
Bed and board "in bed and at the table" (early 13c.) was a term in old law applied to conjugal duties of man and wife; it also could mean "meals and lodging, room and board" (mid-15c.). Bed-and-breakfast in reference to overnight accommodations is from 1838; as a noun, in reference to a place offering such, by 1967.
bed (v.)
Old English beddian "to provide with a bed or lodgings," from bed (n.). From c. 1300 as "to go to bed," also "to copulate with, to go to bed with;" 1440 as "to lay out (land) in plots or beds." Related: Bedded; bedding.
