一大半

The number one; single; a; as soon as; entire; whole; all; a "one" radical in Chinese characters; also used for clarity when spelling out numbers.

Big; large; great; vast; elder; eldest; important; profound; to a great extent; to emphasize; (dialect) father or uncle.

Half; semi-; incomplete; in the middle; a very small amount; part of something; and a half (after a number).