mantle (n.) Look up mantle at Dictionary.com
Old English mentel "loose, sleeveless cloak," from Latin mantellum "cloak" (source of Italian mantello, Old High German mantal, German Mantel, Old Norse mötull), perhaps from a Celtic source. Reinforced and altered 12c. by cognate Old French mantel "cloak, mantle; bedspread, cover" (Modern French manteau), also from the Latin source. Figurative sense "that which enshrouds" is from c.1300. Allusive use for "symbol of literary authority or artistic pre-eminence" is from Elijah's mantle [2 Kings ii:13]. As a layer of the earth between the crust and core (though not originally distinguished from the core) it is attested from 1940.
mantle (v.) Look up mantle at Dictionary.com
"to wrap in a mantle," early 13c.; figurative use from mid-15c., from mantle (n.) or from Old French manteler. Related: Mantled; mantling.