| Word form | yakusoku |
| Original script | 約束 |
| LWT meaning(s) | |
| Word meaning | Original meaning “to bind together”. Present meaning first attested in 917. |
| Grammatical info | do-support |
| Analyzability | analyzable compound |
| Gloss | yaku-soku bind-bundle |
| Age | Late Old Japanese [21] (794–1185) |
| Lexical stratum | kango |
| Year | 917 |
| Comparison with Mandarin | semantic change (both) |
| Register | General |
| Numeric frequency | 66.4 |