This is the 10384th most frequent French word.
isolation
The state of being separated or secluded.
Here 'isolation' refers to a physical barrier used for thermal insulation blocking heat transfer.
L'isolation de la maison empêche le froid d'entrer.
The insulation of the house prevents the cold from entering.
In this sentence, 'isolement' (another form related to 'isolation') signifies a state of being socially detached or alone.
Son isolement social a affecté sa santé mentale.
His social isolation has affected his mental health.
Here, 'isolation' describes soundproofing to prevent noise from passing through surfaces in a room.