The chemical DEET repels some mosquitoes and other insects. Nepetalactone has effects on some insects&colon; it repels cockroaches and mosquitos. The odor of this is so unpleasant that it repels predators. This often attracts girls rather than repels them. A superhydrophobic coating is a thin surface layer that repels water. It is thought that the odor repels other members of its species. A substance that is diamagnetic repels a magnetic field. Jacen successfully repels the attack and keeps his daughter safe. She repels him with magic force, but, wounded, he renews his efforts. These induced dipoles occur when one molecule with a permanent dipole repels another molecule's electrons. A hydrophobe is a chemical compound that repels water. Winterfell's garrison soon repels the ironborn at Torrhen's Square and besieges Winterfell. It is a white solid that repels water. With the combined force of Avalon and Caerleon, Arthur repels the invaders. Professor Lupin repels the dementor with a Patronus Charm.