adentro
/aˈdentɾo/ · A2 · adv
inside
🚪 a + dentro = to + inside; dentro shares a root with interior
Adentro is a (to) + dentro (inside), from Latin de + intro, the same root as English enter, interior and introduce. The a adds motion: going inward. Shouted alone, ¡Adentro! means Come in!