godan verb (-ru), intransitive verb
spring up; leap to one's feet; jump up and down
Describes a sudden, energetic upward movement, often from a seated or crouched position, or repeated jumping in excitement.
驚いて椅子から躍り上がった。
I sprang up from my chair in surprise.
子供たちは嬉しくて躍り上
The children jumped up and down with joy.