Déraisonne is a powerful French verb that means 'to lose one's reason' or 'to act irrationally'. It's formed by adding the prefix dé- (un-) to the word raison (reason), creating a word you won't hear in everyday conversation.
In this melancholic song, Indila sings "Et si parfois je déraisonne, ton absence est mon seul hiver" (And if sometimes I lose my reason, your absence is my only winter). She uses this beautiful word to express how the pain of being separated from a loved one makes her feel like she's going mad, linking her emotional turmoil to the coldness of winter.
This song by French artist Indila uses the seasons to talk about waiting for someone you love. The singer starts by comparing herself to a fallen leaf, saying she's like a "feuille morte / Échouée près de ta porte" (dead leaf / washed up near your door). She feels stuck, waiting for hope to carry her away. She's dreaming of a better life but knows she has to be strong, so she just keeps waiting.
As the seasons change, her feelings do too. She says the person's absence is her "seul hiver" (only winter), which is a beautiful way to describe that cold, lonely feeling. But she holds on to the belief that they will return. By the end, she imagines spring and summer arriving with her loved one, and suddenly she isn't waiting for anyone anymore. The cold is gone, and she realizes "Toute une vie n'est qu'un seul jour sur terre" (A whole life is just a single day on earth).