Understanding Synonyms: Threatening

During a thrilling adventure in the deep jungle, Mia encountered a fierce and dangerous animal lurking behind the bushes. It had bright eyes and sharp claws, making Mia feel a rush of fright. She knew she had to act quickly to ensure her safety. Later, she described the experience to her friends, saying, "The creature I encountered was incredibly threatening, and I barely escaped its grasp."

What does the word threatening mean in this context?