panacea
/ˌpænəˈsiːə/·파나시아·noun
a remedy for all ills or difficulties
GreekCEFR C1
Root
Greek 'pan' (all) + 'akos' (cure, remedy)
Greek panakeia (all-healing) → Latin panacea → English panacea (16th c.)
In a word
Greek pan (all) + akos (cure). From Panakeia, Greek goddess of healing. The pairing of pan with healing carries an ancient human wish — 'cure for all' — panacea (all-healing), panorama (all-seeing), pandemic (all-spreading). When a politician promises a 'cure-all', they borrow a Greek goddess's name without knowing it.
Examples
Technology is no panacea.
There is no panacea for poverty.
Critics warned the law was not a panacea.
Related
pan-panoramapandemicpantheonantidote