Unseen Prose Passages — quick quiz

Read the passage and answer the question. The monsoon season in India is eagerly awaited by farmers across the country. Agriculture in India is heavily dependent on rainfall, and a good monsoon can mean the difference between prosperity and hardship for millions of farming families. The southwest monsoon arrives in Kerala in early June and gradually covers the entire country by mid-July. However, climate change has made monsoon patterns increasingly unpredictable. Some regions receive excessive rainfall leading to floods, while others face drought conditions. Scientists are working on better forecasting models to help farmers plan their crops more effectively. Which word in the passage means 'impossible to predict or foresee'?