This is the 14584th most frequent German word.
lässiger
More casual or more relaxed.
In this sentence, 'lässiger' is used as an adjective to describe 'Stil' (style) and conveys the meaning of 'casual' or 'relaxed'.
Sein lässiger Stil beeindruckt viele Menschen.
His casual style impresses many people.
Here, 'lässigen' is an adjective modifying 'Geste' (gesture), meaning 'casual' or 'effortless'.
Als er mit einer lässigen Geste winkte, fühlte sich alle angesprochen.
When he waved with a casual gesture, everyone felt addressed.
In this context, 'lässig' refers to a relaxed and easy-going environment, functioning as a descriptive adjective for 'Atmosphäre' (atmosphere).