This is the 897th most frequent Vietnamese word.
yên
"Yên" in Vietnamese means "peace," "quiet," or "calm."
Here, "yên" (as part of "yên tĩnh") means quiet and tranquil, describing a serene state of mind.
Hãy giữ cho tâm hồn của bạn luôn yên tĩnh.
Keep your mind always calm.
Here, "yên" refers to a saddle, a physical object used for riding an animal like a horse.
Ngựa này có một chiếc yên rất thoải mái.
This horse has a very comfortable saddle.
Here, "yên" (as part of "yên bình") refers to a state of peace and calm.