What makes a substance abase?

A substance is considered a base if it can accept protons (H⁺ ions) or donate electron pairs in a chemical reaction, according to the Brønsted-Lowry and Lewis definitions, respectively. Bases typically have a pH greater than 7 and can neutralize acids to form salts and water. Common examples include sodium hydroxide and ammonia. Additionally, bases often feel slippery to the touch and can cause chemical burns.