Which word is most similar in meaning to 'void'?

The word 'void' is commonly used to describe something that is empty or lacking in content. It conveys a sense of absence or a state where there is nothing present. Therefore, the word 'empty' is the most similar in meaning to 'void.'

In contrast, 'full' suggests that something is occupied or complete, which directly opposes the concept of being void or empty. Similarly, 'dense' implies a high concentration of something, further reinforcing a state of fullness rather than emptiness. Lastly, while 'minimal' refers to something that is small in amount or degree, it does not capture the complete absence indicated by 'void.' Hence, 'empty' aligns closely with the original meaning of 'void,' making it the best choice in this context.