| bring forward(verb, expression, phrasal verb, agree, yield) |
| undertake(verb, agree, offer, engage, attempt) |
| free(adjective, feature, characteristic, deliberate, natural) |
| intended(adjective, feature, characteristic, free, regard) |
| intentional(adjective, feature, characteristic, free, regard) |
| offer |
| uncompensated(adjective, feature, characteristic, regard, unpaid) |
| unconstrained(adjective, feature, characteristic, free, regard) |
| volitional(adjective, feature, characteristic, free, regard) |
| willed(adjective, feature, characteristic, free, regard) |
| autonomous(adjective, feature, characteristic, free, deliberate) |
| charitable(willing, unpaid) |
| discretional(adjective, feature, characteristic, free, deliberate) |
| donate(verb, give, present, allow, extend) |
| engage(verb, join, admit, gather, enter) |
| give(verb, present, allow, extend, tender) |
| gratuitous(adjective, feature, characteristic, free, deliberate) |
| independent(adjective, feature, characteristic, free, deliberate) |
| optional(adjective, free, deliberate, natural, willing) |
| put forward(verb, expression, phrasal verb, present, agree) |