Similar words
internar
internar specifically means "to admit to hospital"; admitir is more general, "to admit," which can also mean accepting something as true.
Similar in other languages
Spanish
admitir
admitir is the Spanish word for the same thing — both mean "to admit."
French
admettre
admettre is the French word for the same thing — both mean "to admit."
Practice
1 What does admitir mean?
to admit
2 Fill the gap: ___ meu erro.
Full sentence: Admito meu erro. (I admit my mistake.)
3 Which fingerprint chart matches admitir?
admitir: neutral register, common frequency, general domain, neutral connotation.