A person who informs on someone or reveals secrets, often seen negatively.

A person who makes a loud noise or shriek.

चीत्कार करने वाला

English Usage: The child was a real squealer when he saw the spider.

Hindi Usage: जब बच्चे ने मकड़ी देखी, तब वह एक असली चीत्कार करने वाला था।