Nombreux means "numerous" or "many". While it might seem like a common word, its prominent use as the song's title and recurring theme makes it particularly interesting and central to the song's message.
Angèle uses nombreux to highlight the contrast between the many people who try to attract her attention and her unwavering focus on her beloved. She sings, "Nombreux sont ceux qui séduisent" (Numerous are those who seduce) and "Nombreux sont ceux qui dansent près de moi" (Numerous are those who dance near me), emphasizing that despite the many distractions, her eyes are only for one person. This repetition gives the word a powerful and memorable impact within the song's narrative.
Angèle wrote "Nombreux" as a promise made in the middle of temptation. She keeps naming the threats to the relationship directly: "Nombreux sont ceux qui séduisent" ("Many are those who seduce"), "Nombreux sont ceux qui dansent près de moi" ("Many are those who dance close to me") — admitting other people are around and interested, then closing the thought each time with "Tu sais que mes yeux ne suivent que toi" ("You know that my eyes only follow you"). The choice isn't framed as easy; she calls the relationship itself something that overwhelms her, singing "Ça nous dépasse tout cet amour, c'est si heureux" ("This love overwhelms us, it's so happy") and later admitting to jealousy she doesn't even like in herself: "nos jalousies ça me plaît pas mais" ("our jealousies, I don't like it but").
The road imagery in the second verse keeps the song honest about what's ahead: "La route sera pleine de crises" / "La route sera pleine de pentes, dangereuses et brûlantes pour nous" ("The road will be full of crises" / "The road will be full of slopes, dangerous and burning for us"). Nothing here is dressed up as effortless — she expects the highs and the lows and says so. By the final verse the "many" who seduce and dance become "many who commit crimes" and "many who lose in battle" ("Nombreux sont ceux qui sévissent" / "Nombreux sont ceux qui perdent au combat"), widening the crowd from rivals to a whole world that could pull the relationship apart. Her answer stays the same size as the threat: "Tout pourrait changer autour, moi j'voulais tes yeux, ça ne changera pas" ("Everything could change around, but I wanted your eyes, that won't change").