c.1275, from Anglo-Fr.
tumbe, O.Fr.
tombe (12c.), from L.L.
tumba (cf. It.
tomba, Fr.
tombe, Sp.
tumba), from Gk.
tymbos "burial mound, grave, tomb," from PIE base
*teu- "to swell" (see
thigh). The final
-b began to be silent 14c. (cf.
lamb,
dumb).
The Tombs, slang for "New York City prison" is recorded from 1840. A
tombstone (1565) originally was a horizontal stone covering a grave (or the lid of a stone coffin); meaning "gravestone, headstone" is attested from 1711.