Old English heorð "hearth, fireplace, part of a floor on which a fire is made," also in transferred use "house, home, fireside," from Proto-Germanic *hertha- "burning place" (source also of Old Saxon and Old Frisian herth, Middle Dutch hert, Dutch haard, German Herd "floor, ground, fireplace"), from PIE *kerta-, from root *ker- (3) "heat, fire." Hearth-rug is from 1824. Hearth-stone is from early 14c.
Proto-Indo-European root meaning "heat, fire."
It forms all or part of: carbon; carboniferous; carbuncle; cremate; cremation; hearth.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit kudayati "singes;" Latin carbo "a coal, glowing coal; charcoal," cremare "to burn;" Lithuanian kuriu, kurti "to heat," karštas "hot," krosnis "oven;" Old Church Slavonic kurjo "to smoke," krada "fireplace, hearth;" Russian ceren "brazier;" Old High German harsta "roasting;" Gothic hauri "coal;" Old Norse hyrr "fire;" Old English heorð "hearth."
"lobby of a theater or opera house," 1859, from French foyer "green room, room for actors when not on stage," literally "fireplace," from Old French foier "furnace, stove, hearth, fireplace" (12c.), from Latin focarium, noun use of neuter of adjective focarius "having to do with the hearth," from focus "hearth, fireplace" (see focus (n.)).
Roman goddess of hearth and home, late 14c., corresponding to, and perhaps cognate with, Greek Hestia, from hestia "hearth," from PIE root *wes- (3) "to dwell, stay" (source also of Sanskrit vasati "stays, dwells," Gothic wisan, Old English, Old High German wesan "to be"). As the name of a planetoid from 1807 (Olbers).
ancient southern constellation, 1590s, from Latin āra "altar, hearth," from PIE root *as- "to burn, glow."
word-forming element meaning "seven," from Latin septem-, from septem "seven" (see seven). "The Cloister and the Hearth" (1861) has septemvious "going seven different ways" (with Latin via "way").
"thick flat cake, bread baked on the hearth or under ashes," Old English bannuc, from Gaelic bannach "a cake," which is perhaps a loan-word from Latin panicium, from panis "bread" (from PIE root *pa- "to feed").
c. 1200, feuel, feul "fuel, material for burning," also figurative, from Old French foaille "fuel for heating," from Medieval Latin legal term focalia "right to demand material for making fire, right of cutting fuel," from classical Latin focalia "brushwood for fuel," from neuter plural of Latin focalis "pertaining to a hearth," from focus "hearth, fireplace" (see focus (n.)). Figurative use from 1570s. Of food, as fuel for the body, 1876. As "combustible liquid for an internal combustion engine" from 1886. A French derivative is fouailler "woodyard." Fuel-oil is from 1882.
