- 1. [n] one's true character; one's true self; one's true worth
- 2. [adj-na, n] serious; earnest (obs)
Conjugation — Adjective (―na)
This word itself does not change -- these are forms of the copula だ ("to be") attached to it.
| Attributive (before a noun) | しんめんもくな | (shinmenmokuna) |
| Non-past, plain | しんめんもくだ | (shinmenmokuda) |
| Non-past, polite | しんめんもくです | (shinmenmokudesu) |
| Past, plain | しんめんもくだった | (shinmenmokudatta) |
| Past, polite | しんめんもくでした | (shinmenmokudeshita) |
| Negative, plain | しんめんもくじゃない | (shinmenmokujanai) |
| Negative, polite | しんめんもくじゃないです | (shinmenmokujanaidesu) |
| Past negative, plain | しんめんもくじゃなかった | (shinmenmokujanakatta) |
| Past negative, polite | しんめんもくじゃなかったです | (shinmenmokujanakattadesu) |
| Te-form | しんめんもくで | (shinmenmokude) |
| Conditional (―nara) | しんめんもくなら | (shinmenmokunara) |