What are the opposite words for optional?

Antonyms for the word "optional" include mandatory, necessary, compulsory, and required. If something is mandatory, it means it must be done or complied with according to rules, laws, or customs. Necessary implies that something is essential, required, or needed. Compulsory suggests that something is required by authority, law, or obligation. Required means that something is needed or demanded in a particular situation or context. These antonyms highlight the opposite meanings of optional, which implies that something is not required but instead left up to personal choice or preference. Understanding these antonyms can help clarify the meaning of optional and how it relates to other concepts.

Antonym of the day

hath number
estimate, guess, subtract.