đứng lên

Combines the physical posture verb đứng (to stand) with the directional directional particle lên (upward). It directly contrasts with ngồi xuống (to sit down). While primarily used for the physical action of getting to one's feet, it frequently carries a figurative sense of rising up against injustice, oppressing forces, or standing up for a cause.

Useful collocations include đứng lên đấu tranh (to rise up and fight/struggle), đứng lên từ thất bại (to pick oneself up after failure), and kêu gọi đứng lên (to call on people to rise up).