- 1. [adj-na] clear (miracle, sign from the Gods) manifest (arch)
- 2. [adj-na] plain as day; obvious; clear (arch)
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) | いやちこな | (iyachikona) |
| Non-past, plain | いやちこだ | (iyachikoda) |
| Non-past, polite | いやちこです | (iyachikodesu) |
| Past, plain | いやちこだった | (iyachikodatta) |
| Past, polite | いやちこでした | (iyachikodeshita) |
| Negative, plain | いやちこじゃない | (iyachikojanai) |
| Negative, polite | いやちこじゃないです | (iyachikojanaidesu) |
| Past negative, plain | いやちこじゃなかった | (iyachikojanakatta) |
| Past negative, polite | いやちこじゃなかったです | (iyachikojanakattadesu) |
| Te-form | いやちこで | (iyachikode) |
| Conditional (―nara) | いやちこなら | (iyachikonara) |