Etymology
Advertisement
hardback (n.)
"type of book bound in stiff boards," 1954, from hard (adj.) + back (n.).
Related entries & more 
Advertisement
backstairs (n.)
"stairs at the back of a structure," 1650s, from back (adj.) + stairs (see stair). Figurative use is attested earlier (1640s).
Related entries & more 
backing (n.)
1590s, "support at the back;" 1640s, "retreat;" verbal noun from back (v.). Physical sense of "anything placed at or attached to the back of something else" is from 1793. Meaning "musical accompaniment" is recorded from 1937.
Related entries & more 
backorder 
also back-order, by 1980 (n.); 1985 (v.); see back (adj.) + order. Related: Backordered.
Related entries & more 
backhoe (n.)

"excavating equipment consisting of a digging bucket on the end of an articulated arm, typically mounted on the back of a tractor," by 1928, from back (n. or adj.) + hoe (n.).

Related entries & more 
Advertisement
sway-backed (adj.)
1670s, according to OED of Scandinavian origin, perhaps related to obsolete Danish sveibaget. See sway (v.) + back (n.).
Related entries & more 
backyard (n.)
also back-yard, "plot of ground at the rear of a house," 1650s (perhaps early 15c.), from back (adj.) + yard (n.1).
Related entries & more 
backfill (n.)
1900, "material taken from an excavation used to fill a depression," 1900, from back fill (v.), which is attested by 1880; see back (adv.) + fill (v.).
Related entries & more 
hatchback 
type of rear door of an automobile, 1970, from hatch (n.) + back (n.).
Related entries & more 
backtrack (v.)
also back-track, "retrace one's steps," figuratively by 1896, from literal sense, with reference to hunted foxes; see back (adv.) + track (v.). Related: Backtracked; backtracking.
Related entries & more 

Page 4