v. [UNDER-1 4 a.] trans. To lie under, or support, as an arch; to span with an inverted arch.
1611. Florio, Subbarcare, to bow vnder as a bow, to vnder arch, to vnder vault.
1827. Montgomery, Pelican Isl., I. 148. One sevenfold circle, That spanned the horizon, meted out the heavens, And underarched the ocean.
