| Subject | English | Japanese |
| gen. | n vs arbitrary action | 専行 |
| gen. | arbitrary action | 独走 news1 nf13 |
| phys. | arbitrary constant | 任意定数 (にん'い・ていすう) |
| comp., MS | arbitrary credit charge | 任意の返金/請求 (To apply a credit or debit to or from a customer's payment instrument that is not a normal purchase transaction) |
| construct. | arbitrary cross-section | 任意断面 (にん'い・だんめん) |
| gen. | n vs arbitrary decision | 独り決め |
| gen. | n vs adj-na adj-no arbitrary decision | 擅断 |
| gen. | n vs adj-na adj-no arbitrary decision | 専断 |
| gen. | exp arbitrary order | 順不同 |
| gen. | arbitrary origin | 任意原点 |
| gen. | n arbitrary panel layout | 変形ゴマ |
| gen. | arbitrary shaped structure | 任意形状構造物 |
| gen. | n arbitrary use of power | 専権 |
| gen. | by one's arbitrary decision | 勝手ながら with noun+する or noun+をverb |
| gen. | n making arbitrary decisions which benefit oneself | 御手盛り |
| gen. | n making arbitrary decisions which benefit oneself | お手盛り news2 nf33 (おてもり) |
| gen. | n yoji rife with arbitrary decisions | 専断横行 (acting on one's own authority) |