panacea

Etymology

From Latin panacēa, from Ancient Greek πανάκεια (panákeia), from πανακής (panakḗs, “all-healing”), from πᾶν (pân, “all”) (equivalent to English pan-) + ἄκος (ákos, “cure”).

noun

1. A remedy believed to cure all disease and prolong life that was originally sought by alchemists; a cure-all.
2. A solution to all problems.
   A monorail will be a panacea for our traffic woes.
   Hydrogen is not a panacea for reaching the zero net emissions target by 2050, but it can grow to become "a big niche" fuel in particular sectors and applications, claims a new report. January 11 2023, “Network News: MPs seek clarity on hydrogen's role”, in RAIL, number 974, page 13
3. (obsolete) The plant allheal (Valeriana officinalis), believed to cure all ills.