means So tired you're worn out — drained in body, mind, or spirit, often past the point of caring.

from From Old English 'wērig,' meaning exhausted or tired, a word with Germanic roots possibly tied to an ancient sense of stumbling or being weak. The same family gives us 'worse' relatives in old Germanic tongues for failing strength. It's a survivor — the kind of plain, heavy word the language has carried, unchanged in feeling, for well over a thousand years.