noun
ligament
LIG-uh-ment/ˈlɪɡəmənt/
A tough band of tissue that connects or supports body structures, especially at a joint.
A ligament connects the bones and helps stabilize the knee.

Etymology
The pieces describe a means of binding: Latin ligamentum meant a band, bandage, or tie. The anatomical meaning applies that image to tissue that binds bones together.
In context
And then for that unstable ligament, we put in a human donor ligament to stabilize the knee.
Would you rather break a bone or sprain a ligament?
More examples
- She tears a ligament in her ankle during practice.
- Ligaments help hold the uterus in place.
- The surgeon repairs the damaged ligament in his wrist.
Forms
ligament · ligaments
ligamentous adjective — Made of or resembling a ligament.