descer, subir
DESCER = to go down. It’s most commonly used in the context of going up & down the elevator and getting off (a bus, a car).
Eu vou descer aqui. (I'm going to get off here.)
SUBIR = to go up.
Ela pode subir. (She can come up.)
subir
subir » to go up
Vamos subir a serra. (Let's go up the hills.)
Vamos subir a escada. (Let's go up the stairs.)
O gato subiu na árvore. (The cat climbed the tree.)
SUBIR often takes the meaning of coming up the elevador to visit an apartment.
Ela pode subir. (She can come up.)
Eu estou subindo agora. (I'm coming up now.)
Vamos subir de elevador. (Let's go up the elevador.)