This is the 754th most frequent Vietnamese word.
trụ
"Trụ" in Vietnamese means "pillar," "post," or "support."
In this sentence, 'trụ' refers to a physical pole or pillar, which is a structural object.
Cây trụ điện này rất cao.
This electrical pole is very tall.
Here, 'trụ' is used metaphorically to describe endurance or perseverance.
Anh ấy cố gắng trụ vững trước khó khăn.
He tries to endure steadfastly through difficulties.
In this context, 'trụ' is part of the term 'trụ sở,' meaning headquarters or main office.