| straightforward(clear, sharp, plain, definite, obvious) |
| sure(certain, definite, obvious, distinctive, unquestionable) |
| sure thing(expression, sound, certain, true, definite) |
| transparent(clear, simple, sharp, plain, certain) |
| transpicuous(simple, sharp, distinct, understandable, well-defined) |
| true(sound, certain, definite, evident, unquestionable) |
| unadorned(adjective, simple, clean, plain, pure) |
| unadulterated(adjective, simple, clean, plain, pure) |
| unaffected(adjective, simple, clean, plain, pure) |
| unalloyed(adjective, simple, clean, plain, pure) |
| unambiguous(clear, sharp, plain, definite, obvious) |
| unanswerable(sound, certain, true, definite, unquestionable) |
| unarguable |
| unavoidable(adjective, obvious, bound, inevitable, inescapable) |
| unblended(adjective, simple, clean, plain, pure) |
| unblurred(simple, sharp, distinct, understandable, well-defined) |
| uncluttered(adjective, simple, clean, plain, pure) |
| uncombined(adjective, simple, clean, plain, pure) |
| uncompounded(adjective, simple, clean, plain, pure) |
| undecorated(adjective, simple, clean, plain, pure) |