| underwrite(verb, agree, declare, approve, uphold) |
| asservate(verb, agree, declare, commit, undertake) |
| binder(noun, promise) |
| confirm(verb, support, maintain, secure, undertake) |
| cross heart(verb, expression, agree, declare, commit) |
| devoir(noun, charge, burden, need, responsibility) |
| espouse(verb, join, agree, catch, declare) |
| live up to(verb, expression, idiom, agree, declare) |
| pledge oneself(verb, expression, idiom, undertake, promise) |
| say so(verb, expression, agree, declare, commit) |
| string along(verb, expression, agree, commit, undertake) |
| swear an oath(verb, expression, idiom, promise, swear) |
| swear on bible(verb, expression, idiom, agree, declare) |
| swear up and down(verb, expression, idiom, agree, declare) |
| assurance obligation(expression, need, promise, engagement) |
| committal(noun, burden, need, responsibility, liability) |
| depend on(verb, expression, undertake, promise, swear) |
| give witness(verb, expression, undertake, promise, swear) |
| give your word(verb, expression, idiom, promise, swear) |
| have confidence in(verb, expression, idiom, undertake, promise) |