再衰三竭

weakening and close to exhaustion (idiom); in terminal decline / on one's last legs

again; once more; re- / second; another / then (after sth, and not until then) / no matter how ... (followed by an adjective or verb, and then (usually) 也[ye3] or 都[dou1] for emphasis)

mourning garments

to decline / to wane / to become weak or feeble

three / 3

to exhaust