Liesse translates to "joy" or "jubilation", but it's a more elevated and less common word than joie.
In the song, Grégoire uses it to describe the intense happiness he felt in a past relationship: "Ces heures qui près de toi n'étaient que liesse" (These hours near you were nothing but joy). It evokes a profound and almost celebratory sense of happiness, making it a striking and memorable word.
Grégoire's "Je Laisse" [I Let] is a really heartfelt song about moving on from a past relationship. He talks about letting time heal him, waiting "pour qu'on me donne de la tendresse" [for someone to give me tenderness] and for the pain to fade away. It's all about finding peace after a breakup, even when memories linger.
He's learning to forget the person's presence, their smell, their hair, and their touch, remembering "Ces heures qui près de toi n'étaient que liesse" [These hours near you were only joy]. Even though he admits, "Même si je traîne encore un peu dans ton décor" [Even if I still linger a bit in your decor], he's determined to get through it, saying "Mais je m'en sors" [But I'm getting out of it]. It's a journey of healing, where he lets his strength overcome his weakness and finds a new love, embracing "ses mains posées sur moi pleines de tendresse" [her hands placed on me full of tenderness] and finally saying "Et je l'adore" [And I adore her].