Word for "truncate to size zero"

Is there a word for "truncate to size zero", preferably one which could be used and understood in the following way:

"...ing the file" := "truncating the file to zero bytes"?

RECAP: The best answers so far seem to be "empty the file", "zero the file size" and "truncate to (size|length) zero". In a suitable context, "truncate" has "truncate to (size|length) zero" as the default meaning (esp. since it's the commonest specific length to which files are truncated) but it's by no means the only one

Solution 1:

empty the file, could be used. After all, one is left with an empty file.

There is Google evidence of usage for empty the file.

There is also Google evidence of usage for clear the file.

Solution 2:

Truncate is the correct word. Truncating a file means to eliminate all the content. The MySQL command for removing a table in database is TRUNCATE, which I present as a related term that clearly indicates the "zero size" aspect.

EDIT: Just to be clear, the "to size zero" is redundant. Truncate means what you want to say here.

Solution 3:

"Zeroing out" the file? Used to specify that a file has been deleted/shredded using an algorithm that sets all bits that were used to store the file to zeroes.