participar
/paɾtiθiˈpaɾ/ · B1 · verb
to participate, to take part, to partake
🙋 part + i + cipar = take part: participar is to be part of it
From Latin participare: pars (part) + capere (to take), literally to take a part. Same root as English participate and particle. Spanish uses participar en: participar en la reunión means to take part in the meeting.