| plain(adjective, open, direct, free, simple) |
| outspoken(adjective, open, direct, free, easy) |
| pure(adjective, simple, plain, natural, straightforward) |
| unreserved(adjective, open, direct, free, easy) |
| unstudied(adjective, simple, honest, plain, natural) |
| above-board |
| aboveboard(adjective, open, direct, free, simple) |
| blunt(adjective, open, direct, free, easy) |
| childlike(adjective, simple, honest, plain, pure) |
| simple-minded(adjective, simple, honest, straightforward, innocent) |
| undeceitful |
| undeceiving |
| undesigning(adjective, open, honest, true, straightforward) |
| honorable(adjective, honest, sincere, genuine, candid) |
| honourable |
| true(adjective, good, open, honest, straightforward) |
| undeceptive |
| unfeigned(adjective, open, honest, pure, true) |
| callow(adjective, simple, natural, straightforward, innocent) |
| clear |