noun
stallion
STAL-yun/ˈstæliən/
An uncastrated adult male horse.
The adult stallion stands calmly, turned slightly to one side.

Etymology
Old French estalon named an uncastrated male horse. The underlying image is probably a horse kept in a stable to serve mares, connecting the term specifically with its breeding role.
In context
studs left intact for a long period developed dangerous traits as learned behavior if you are not planning on breeding life as a stallion can be full of frustration due to the nature of the horse under human control
More examples
- The farm keeps two stallions for breeding.
- She brushes the stallion's mane before their morning ride.
- A stallion that has been castrated is called a gelding.
Forms
stallion · stallions