I . a.
1.
Even, level, smooth, flat, plane.
2.
Open, clear, unencumbered, uninterrupted.
3.
Manifest, visible, obvious, clear, unmistakable, apparent, certain, palpable, conspicuous, notable, notorious, glaring, patent, open, evident, distinct.
4.
Unequivocal, unambiguous, distinct, explicit, intelligible, perspicuous.
5.
Simple, unadorned.
6.
Homely, ugly, ill-looking, ill-favored.
7.
Artless, honest, sincere, candid, frank, open, downright, direct, unsophisticated, ingenuous, undesigning, straightforward, single-minded, open-hearted, above-board, unreserved.
8.
Artless, simple, unlearned, unsophisticated, natural, unaffected, homely, common.
9.
Mere, absolute, unmistakable.
10.
Easy, direct, clear.
11.
Simple, frugal, homely.
12.
Unornamented, unfigured, unvariegated.
II . n.
Plateau, champaign, savanna, pampas, table-land, champaign country.