arch

I

n

1. archway, arched doorway, arched gateway; span, vault, dome, cupola, cove, coved vault, cloistered vault; bow, bend, curve, arc, convexity, camber, curvature, horseshoe; camber piece, camber slip, Anat. fornix, Math. catenary, Geom. cycloid.

v

2. arch over, vault, span, bridge; bow, bend, curve, camber.

II

adj

1. chief, foremost, most important, principal, first; greatest, highest, consummate, extreme; first-class, first-rate, Inf. number one, top.

2. cunning, shrewd, adroit, sly, tricky, artful, designing, intriguing; waggish, roguish, saucy, mischievous; frolicsome, playful, prankish, tricksy, tricksome.