How to pronounce“unsolicitedly”in English

the MoMA building actually caught on fire. I have a picture of this. While members of the trustees and senior staff were in standard issue fire brigade helmets, members of thepublic were standing across the street and as a couple of people recalled they would unsolicitedly walk over and deposit a dollar or five dollars on the membership desk andthen leave. That kind of public sentiment toward museums has probably not been engendered in this country for a long time. So the public sentiment in this notion of trust in museums