| Subject | English | Japanese |
| phys. | weakly compact | 弱コンパクト (jaku-konpakuto) |
| phys. | weakly continuous | 弱連続 (ぢゃくれんぞく) |
| gen. | weakly countable | 弱可算 |
| antenn., opt. | weakly guiding fibre | 弱導波ファイバ |
| phys. | weakly ionized plasma | 弱電離プラズマ (jakudenri-purazuma) |
| gen. | adj-i weakly related | 縁遠い news2 nf46 |