Being petulant is a behavior characterized by being irritable, touchy, and easily annoyed. SNIVEL, which has 6 letters, means to cry or whine in a weak, self-pitying way. SULK, which has 4 letters, means to be sullen and bad-tempered, especially as a result of disappointment or discontent. POUT, which also has 4 letters, means to express displeasure by thrusting out the lips or to SULK in a childish way. Together, these three words describe the behavior of someone who is being petulant.