Sentimental means 'sentimental' in English. While it might seem like a direct translation, its use here is key to understanding the song's core message.
Slimane uses this word to describe himself, emphasizing his emotional and sensitive nature. He sings, "Je suis sentimental, tu connais ma mentale" (I am sentimental, you know my mindset), setting the tone for a song about deep feelings and genuine affection. It's a foundational word that unlocks the song's emotional depth.
"Sentimental" is Slimane's tender promise to a new partner who has been hurt before. He opens by asking her not to compare him to the people who let her down, insisting he's not afraid of love and won't run from it.
The chorus is the heart of the song: he calls himself sentimental, says he knows his own heart well, and promises he won't hurt her or judge her flaws. He just wants her to feel safe resting in his arms.
By the bridge he's offering her his whole heart, promising to carry her pain away, and by the final verses he's simply asking her to dance close and stay, singing until he loses his voice.