The word 'compulsory' means something that is required by law or rule. It describes actions or things that are not optional - you must do them because they are mandatory. For example, wearing a seatbelt while driving is compulsory in most countries.
Compulsory is commonly used in several contexts. In education, we have compulsory education, meaning children must attend school until a certain age. Military service can be compulsory in some countries. Car insurance is compulsory in most places. In schools, certain subjects like math and English are often compulsory for all students.
Here are some example sentences using 'compulsory'. First, wearing a seatbelt is compulsory in most countries, meaning it's legally required. Second, math and English are compulsory subjects in the first year of school. Third, compulsory vaccination programs help control diseases. Finally, military service is compulsory for all young men in some countries.
It's important to understand the difference between compulsory and optional. Compulsory means you must do something - there's no choice, it's required by law or rule. Optional means you can choose whether to do it or not - it's voluntary and up to you. For example, wearing a helmet while cycling might be compulsory in some places but optional in others.
To summarize, 'compulsory' is an important English word meaning required or mandatory. It's commonly used in legal, educational, and official contexts. Remember that compulsory means there's no choice - you must do it. The opposite would be optional or voluntary. Understanding this word will help you better comprehend rules, laws, and requirements in English-speaking contexts.