Molecules that are water-fearing and try to stay away from water or other polar molecules are called hydrophobic.

Here's why:

* Polarity: Water is a polar molecule, meaning it has a positive and a negative end due to uneven sharing of electrons. This allows water molecules to form strong hydrogen bonds with each other.

* Hydrophobic Interactions: Hydrophobic molecules are typically nonpolar, meaning they lack the uneven charge distribution that allows for strong hydrogen bonds. They have a harder time interacting with water molecules and tend to clump together, avoiding contact with water.

* Examples: Examples of hydrophobic molecules include fats, oils, and some proteins.

Key takeaway: Hydrophobic molecules are repelled by water and other polar molecules due to their nonpolar nature. This behavior plays a critical role in many biological processes, such as the formation of cell membranes and the folding of proteins.