a coined
phrase expressing thoroughness, completeness; all the way. This
phrase may come from the idea of a young
dog persistently
tracking or trailing something or digging in the
ground for something for which he has caught the
scent. The
word root is often used in phrases indicating thoroughness or
totality and may allude to the
fact that if one goes down to the root (such as of a tree or
plant), one is including the entirety of something down to the very bottom or
base.
a coined
phrase denoting completeness or thoroughness, like a young
dog (puppy) persistently digging,
tracking or trailing something.