hydrophobic

This term carries a strong technical weight, primarily appearing in chemistry, materials science, and biology. It describes a physical repulsion where a substance actively resists bonding with water molecules, creating a visible effect of water sliding away rather than soaking in. In a social or psychological context, the word is occasionally used as a metaphor for someone who avoids water or avoids "fluid" and adaptable situations, though this is far less common than its scientific application. It suggests a hard boundary or a total lack of compatibility.