Here's why:

* Triglycerides are fats: They are composed of a glycerol molecule (a type of alcohol) and three fatty acid chains.

* Fats are hydrophobic: This means they repel water. Water molecules are polar, while fats are nonpolar.

* Chemical bonds: The bonds within a triglyceride molecule are strong covalent bonds, not the weaker hydrogen bonds found in water.

However, water can be present in the environment surrounding triglycerides. For example, water is essential for the digestion and metabolism of fats.