- 1. [adj-na, n] profundity; extensive (knowledge)
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) | がいはくな | (gaihakuna) |
| Non-past, plain | がいはくだ | (gaihakuda) |
| Non-past, polite | がいはくです | (gaihakudesu) |
| Past, plain | がいはくだった | (gaihakudatta) |
| Past, polite | がいはくでした | (gaihakudeshita) |
| Negative, plain | がいはくじゃない | (gaihakujanai) |
| Negative, polite | がいはくじゃないです | (gaihakujanaidesu) |
| Past negative, plain | がいはくじゃなかった | (gaihakujanakatta) |
| Past negative, polite | がいはくじゃなかったです | (gaihakujanakattadesu) |
| Te-form | がいはくで | (gaihakude) |
| Conditional (―nara) | がいはくなら | (gaihakunara) |