This is the 8440th most frequent French word.
activer
To activate or to turn on.
Here, 'activer' is used to mean 'to turn on' or 'to enable' a feature or function on an electronic device.
Je vais activer le mode avion sur mon téléphone.
I will activate airplane mode on my phone.
In this example, 'activer' means 'to engage' or 'to stimulate' muscular actions or responses during physical activity.
Il faut activer ses muscles pendant cet exercice.
You need to activate your muscles during this exercise.
The usage of 'activer' here signifies 'to initiate' or 'to set in motion' a plan or action to achieve a specific goal.