- 1. [v5u] to make a joint vow; to swear together; to pledge
Conjugation — Verb (godan-u)
| Dictionary form | ちかいあう | (chikaiau) |
| Polite | ちかいあいます | (chikaiaimasu) |
| Past, plain | ちかいあった | (chikaiatta) |
| Past, polite | ちかいあいました | (chikaiaimashita) |
| Negative, plain | ちかいあわない | (chikaiawanai) |
| Negative, polite | ちかいあいません | (chikaiaimasen) |
| Past negative, plain | ちかいあわなかった | (chikaiawanakatta) |
| Past negative, polite | ちかいあいませんでした | (chikaiaimasendeshita) |
| Te-form | ちかいあって | (chikaiatte) |
| Potential | ちかいあえる | (chikaiaeru) |
| Volitional | ちかいあおう | (chikaiaou) |
| Conditional (―ba) | ちかいあえば | (chikaiaeba) |
| Passive | ちかいあわれる | (chikaiawareru) |
| Causative | ちかいあわせる | (chikaiawaseru) |
| Imperative | ちかいあえ | (chikaiae) |