axles is a form of:

Axle



noun
1.
(The rod on which a wheel turns, the center rod of a wheel which revolves as the wheel turns, the rod that joins two wheels) ភ្លៅរទេះឬភ្លៅរថ, ពន្លួញ, ស្នូលសម្រាប់បង្វិល
ENGLISH MEANING
noun
1.
The pin or spindle on which a wheel revolves, or which revolves with a wheel.
2.
A transverse bar or shaft connecting the opposite wheels of a car or carriage; an axletree.
3.
An axis; as, the sun's axle.