This is the 230th most frequent Japanese word.
六
The Japanese word "六" means "six."
The word '六' is used here as a numeral to indicate the number, 'six', of people in my family.
私の家族は六人です。
My family has six members.
The word '六' is used in its traditional counting form '六つ' to enumerate objects (apples) distinguished by the counter system.
六つのりんごを買いました。
I bought six apples.
The word '六' is used here combined with '日' to indicate a quantity of time, specifically 'six days', denoting the continuation time needed.