Despertar means "awakening" or "to wake up." While the verb form is common, its use as a noun in this context is particularly poetic and evocative.
In the song, the lyric "O amanhecer do meu despertar" (The dawn of my awakening) uses despertar to signify a profound emotional or spiritual awakening brought about by love, rather than just physically waking up. It suggests a moment of realization and renewed life, making it a beautiful and memorable word in the context of this romantic song.
Roupa Nova open on a man alone in a room that will not let him move on: "Nesse quarto a solidão / De um pobre coração / Que não entendeu o adeus" ("In this room, loneliness / Of a poor heart / That didn't understand goodbye"). The goodbye was said; he refuses to file it. "E não aceito o fim" ("And I don't accept the end") is the whole argument of the verse, and the request after it is small and specific — "Diz, por favor, que vai voltar pra mim" ("Please say you'll come back to me").
Then the chorus stops arguing and starts describing. She becomes water and light: "Seu corpo é o mar reflete o luar" ("Your body is the sea, reflects the moonlight"), "Calor do sol que vem de você" ("The sun's warmth that comes from you"). The title arrives as something other people say about him — "Meus amigos vão falar / Achar que sou romântico demais" ("My friends will talk / Think I'm too romantic") — and he takes the charge without defending himself: "Gosto de poder gostar" ("I like being able to love"). The 1988 recording ends mid-sentence on "Seu corpo é" ("Your body is"), the chorus fading out before he can finish it one more time.