explicar
/eɡspliˈkaɾ/ · A2 · verb
to explain
📖 explicar = ex (out) + plicar (to fold): unfold an idea, like explicate
From Latin explicare, to unfold. English explain and explicate are close cousins, so swap the ending for -ar. The same fold root shows up in complicar (fold together) and aplicar (fold onto).