When something humiliating happens to you, it makes you feel embarrassed and ashamed. Your humiliating haircut might force you to wear a stocking cap to work.
Something that humbles you and makes you feel foolish is humiliating: it's humiliating to sing your song for the school talent show in the wrong key, and it's even more humiliating when the audience laughs. Admitting defeat in a competition or battle is often described as humiliating, as are most kinds of public embarrassment. The noun humiliation came first, from the same root as humble, the Latin humilis, "lowly, humble," and literally, "on the ground."