Guay
Cool, great, awesome — the everyday Spanish word for approval.
Related lesson: Everyday Phrases Textbooks Never Teach.
Hear it in context
¡Qué guay tu piso nuevo!
Your new place is so cool!
Sería guay quedar el finde.
It would be cool to meet up this weekend.
— ¿Qué tal el concierto? — Muy guay, la verdad.
"How was the concert?" "Really cool, honestly."
What It Actually Means
Guay is Spain’s default word for “cool” or “great” — an all-purpose stamp of approval used constantly by younger speakers and increasingly by everyone else. It works as a standalone reply, an adjective, or an intensified exclamation with qué.
Where Textbooks Get It Wrong
Textbooks lean on estupendo or fantástico for enthusiasm, but those sound noticeably formal in casual conversation. A Spaniard reacting to good news is far more likely to say ¡Qué guay! than either of those.
Regional Note
Guay is Peninsular Spanish through and through. In Latin America the equivalent is usually chévere (Venezuela, Colombia, Ecuador), padre (Mexico), or bacán (Peru, Chile) — see the regional guides for how each country marks approval differently.
Common Pitfall
Guay is casual register — fine with friends and family, best avoided in a job interview or formal email, where estupendo or genial are safer choices.