| simple(plain, natural, ingenuous, unworldly, guileless) |
| suitable(adjective, friendly, appropriate, amenable, receptive) |
| tangible(adjective, obvious, manifest, evident) |
| to be had(expression, adjective, idiom, friendly, appropriate) |
| transparent(adjective, free, friendly, appropriate, honest) |
| true(simple, plain, natural, ingenuous, unworldly) |
| unadorned(simple, plain, natural, ingenuous, unworldly) |
| unaffected(simple, plain, natural, ingenuous, unworldly) |
| unambiguous(adjective, obvious, manifest, evident) |
| unconditional(adjective, friendly, appropriate, amenable, receptive) |
| uncontrived(adjective, simple, plain, natural, ingenuous) |
| understandable(adjective, obvious, manifest, evident) |
| unmistakable(adjective, obvious, manifest, evident) |
| unoccupied(adjective, friendly, appropriate, amenable, receptive) |
| unpretentious(simple, plain, natural, ingenuous, unworldly) |
| unqualified(adjective, friendly, appropriate, amenable, receptive) |
| unrestricted(adjective, friendly, appropriate, amenable, receptive) |
| unsophisticated(simple, plain, natural, ingenuous, unworldly) |
| usable(adjective, friendly, appropriate, amenable, receptive) |
| vacant(adjective, friendly, appropriate, amenable, receptive) |