A more thorough explanation:

Definition: Examples: Explanation: The term "hostile" refers to something that is adverse, unfriendly, or showing ill will. In the first example, the hostile weather conditions made it difficult for the hikers to reach the summit, illustrating the adverse nature of the weather. In the second example, the employee's hostile attitude towards his colleagues led to his termination, illustrating the ill will and unfriendliness of his behavior. In the third example, the two countries have been in a hostile relationship for years, with frequent border disputes and military conflicts, illustrating the antagonistic and unfriendly nature of their interactions.