How do you say "to volunteer" in spanish?

Question

and also the act of volunteering? Voluntariamente?

Answer 1

volunteer vt ofrecer*; to volunteer one’s services ofrecer*
sus (or mis etc) servicios; he’s not going to volunteer the
information no nos dará la información (de) motu proprio;
Harry’s gone, she volunteered —Harry se ha ido —dijo sin
que nadie se lo hubiera preguntado

volunteer vi ofrecerse*; to volunteer to + INF ofrecerse* A +
INF; she volunteered to cook dinner se ofreció a hacer la
cena; he volunteered for the navy (Mil) se alistó como
voluntario en la marina

Answer 2

There's no specific verb for that. You need to say "ofrecerse como voluntario".

"Volunteering" (noun) = "voluntariado"

"voluntariamente" means "voluntarily".
.

Answer 3

volunteer= voluntario
voluntarily= voluntariamente

Answer 4

para ofrecerse