sub

In a sentence

• O subdiretor ajudou na organização do evento.

  The assistant director helped in the organization of the event.

  Here, 'sub' is a prefix meaning 'assistant' or 'deputy', modifying 'diretor' (director).

• O atleta torceu o subligamento durante o treino.

  The athlete sprained the subligament during practice.

  In this case, 'sub' indicates 'under' or 'beneath' as part of 'subligamento' (subligament).

• O submarino explorou as profundezas do oceano.

  The submarine explored the depths of the ocean.

  Here, 'sub' denotes 'under' or 'below', typically referring to under water in 'submarino' (submarine).