Heady means strong enough to go straight to your head. A heady perfume, heady days, heady mixture.
It is used of drink, scent and experience alike, and it always suggests being slightly overwhelmed rather than merely pleased. Heady days is a fixed phrase for an exciting period, usually looked back on. Note that the word is head plus -y, and once meant headstrong, which is a different kind of going to the head.
1adjectiveheadyStrong enough to go straight to your head.
“The heady scent of roses filled the warm evening air.”
synonyms: intoxicating, exhilarating
heady is a quality of intoxication.
Middle English hedi is head plus -y. It once meant headstrong or impetuous.
Proto-Indo-European
*kap-
Middle English
hedi
English, today
heady
From Middle English hedi, hevedi, equivalent to head + y.
Etymology from Wiktionary, CC BY-SA