This is the 3989th most frequent Portuguese word.
lapa
"Lapa" in Portuguese refers to a cave, grotto, or a species of limpet (marine mollusk).
Here, 'lapa' means 'cave', which indicates a specified geological formation.
A lapa está localizada em um local remoto e de difícil acesso.
The cave is located in a remote and hard-to-access area.
In this sentence, 'lapa' metaphorically refers to an outstanding or exceptional amount of something, a figure of speech.
Ele é uma lapa de conhecimento em ciências exatas.
He is a powerhouse of knowledge in exact sciences.
Once again, 'lapa' describes a natural cave, illustrating its straightforward geographic sense.