volunteered
v.v. offered to do something without being asked or paid. You use this when you choose to help others or give your time for free.
v. the past tense and past participle of 'volunteer', meaning to offer one's services or information of one's own free will. It can be used transitively with an object or intransitively.
She volunteered at the local animal shelter last weekend.
When the manager asked for someone to work on Saturday, Mark volunteered immediately despite his busy schedule.
The witness volunteered several crucial details to the investigators that eventually led to a breakthrough in the cold case, even though he was under no legal obligation to speak.
Can be used as an intransitive verb or followed by an infinitive ('volunteered to help') or a direct object ('volunteered his time').