explicación
/eɡsplikaˈθjon/ · B1 · noun · f
explanation
explicación = explic(ar) + -ción: explain + -tion, a near twin of explanation
From Latin explicare, to unfold: ex- (out) + plicare (to fold). An explanation unfolds an idea so it lies flat. Spanish -ción matches English -tion and is always feminine: la explicación.