under-earthn.
/ˈʌndərəːθ/, U.S. /ˈəndərˌərθ/ 1.
a. The earth or soil lying below the surface.
ΘΚΠ
the world > the earth > structure of the earth > constituent materials > earth or soil > [noun] > subsoil
sole1683
undersoil1707
substratum1730
under-earth1765
subsoil1774
subsurface1775
substramen1797
underground1812
1765 Museum Rusticum 4 157 To defend the roots of my young trees from the damp, raw under-earth.
b. Mining. (See quot. 1883.)
ΘΚΠ
the world > the earth > minerals > mineral deposits > features of stratum or vein > [noun] > material below > below coal
thill1329
underclay1660
sloom1803
underclift1840
warrant1847
swad1860
spavin1870
undercliff1883
under-earth1883
1883 W. S. Gresley Gloss. Terms Coal Mining 267 Underearth, a hard bastard fireclay forming the floor of a seam of coal.
2. The regions below the earth.
ΘΚΠ
the world > the earth > structure of the earth > [noun] > subterranean parts
underground1590
underfolda1618
under-earth1878
underworld1885
1878 W. E. Gladstone Homer iv. 56 Tartaros..standing to the Under-earth as the heaven stands to the Upper..world-surface.
1896 Boston (Mass.) Youth's Compan. 10 Dec. 659/2 The economical resources of the underearth were the goals of the first practical studies of the rocks.
This entry has not yet been fully updated (first published 1921; most recently modified version published online March 2022).
under-earthadj.
/ˈʌndərəːθ/, U.S. /ˈəndərˌərθ/ Subterranean, underground.
ΘΚΠ
the world > the earth > structure of the earth > [adjective] > subterranean
subterraneal1592
under-earth1592
under-earthly1605
subterranean1607
subterraneous1607
subterrene1610
underground1610
subterrestrial1613
subterrane1614
subterrany1626
sotteran1648
subterrenean1653
subterrean1659
mediterraneous1668
hypogeal1686
submundane1805
subsurface1840
hypogeous1847
hypogean1852
below ground1859
catachthonic1884
catachthonian1888
the world > space > relative position > low position > [adjective] > situated or placed under > below the ground
lowc1350
subterraneal1592
under-earth1592
under-earthly1605
subterranean1607
subterraneous1607
subterrene1610
subterrestrial1613
subterrane1614
subterrany1626
sotteran1648
subterrenean1653
hypogeal1686
hypogeous1847
hypogean1852
below ground1859
1592 T. Nashe Pierce Penilesse (Brit. Libr. copy) sig. K3 The vnder-earth spirits, are such as lurk in dens & little cauernes of the earth.
1613 S. Purchas Pilgrimage ii. i. 104 Philip the Tetrarch..first found out this under-earth passage.
1662 J. Chandler tr. J. B. van Helmont Oriatrike 322 Paracelsus reducing all things into an under-earth off-spring.
1816 Ld. Byron Could I Remount 23 The under-earth inhabitants—are they But mingled millions decomposed to clay?
This entry has not yet been fully updated (first published 1921; most recently modified version published online March 2022).
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n.1765
adj.1592