線の太い · i-adjective
| Form | Positive | Negative |
|---|---|---|
| Dictionary | 線の太い | 線の太くない |
| Polite | 線の太いです | 線の太くないですalso 線の太くありません |
| Past polite | 線の太かったです | 線の太くなかったですalso 線の太くありませんでした |
| Past | 線の太かった | 線の太くなかった |
| Te-form | 線の太くて | 線の太くなくて |
| Adverbial | 線の太く | |
| Conditional | 線の太ければ | 線の太くなければ |
| Tara conditional | 線の太かったら | 線の太くなかったら |
Describes a person who is unshakable, confident, and not easily swayed by pressure. Often used to praise someone's mental strength or assertiveness.
He's a strong-nerved person, so he won't be fazed by any difficulty.
A decisive attitude is required in negotiations.
The expression likely derives from the metaphor of a thick line (線) being sturdy and unbreakable, applied to a person's character. The exact origin is uncertain.