一無所知

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.

Not to have; no; none; not; to lack; un-; -less; used in Buddhist phrases like 'namo'.

Place or location; classifier for buildings or institutions; particle introducing a relative clause or passive construction; that which.

To know; to understand; to be aware of; to recognize; to distinguish; to associate with; to entertain or treat; knowledge or learning.