This is the 161st most frequent French word.
surtout
"Above all" or "especially."
In this sentence, 'surtout' is used to emphasize a particular preference, meaning 'especially'.
Je préfère surtout le chocolat noir.
I especially prefer dark chocolate.
Here, 'surtout' emphasizes the importance of caution in a specific context, akin to 'particularly'.
Il faut surtout faire attention en traversant la rue.
You must especially pay attention when crossing the street.
In this sentence, 'surtout' introduces the most critical instruction, translating to 'above all' or 'most importantly'.