速

Its parts

• 辶 chuò to walk (side part of split character) meaning
• 束 shù to bind sound

Other characters with 束 as their sound:

辣 là剌 là敕 chì竦 sǒng涑 sù悚 sǒng欶 shuò脨 jí

Dictionaries file it under 辵.