succavus
Could not find subcava in Logeion dictionaries.
subcava feminine nominative singular, neuter nominative plural, feminine vocative singular, neuter accusative plural, neuter vocative plural, feminine ablative singular of succavus
suc-căvus (subc-), a, um, adj.,
- hollow below or underneath (ante- and post-class.): areae, Cato R. R. 151, 3: loca, Lucr. 6, 557; Auct. Limit. pp. 252, 260, 303 Goes.: natura Aetnae, Lucr. 6, 682.