This is the 14575th most frequent German word.
lockeren
"Lockeren" means "to loosen" or "to relax" in English.
In this sentence, 'lockeren' is used as an adjective to describe 'Schnürsenkeln' (laces) indicating that they are not tightly fastened.
Ich habe ein Paar Schuhe mit lockeren Schnürsenkeln.
I have a pair of shoes with loose laces.
Here, 'lockeren' is employed as an adjective to characterize 'Arbeitsstil' (work style), suggesting a casual or non-strict manner.
Er mag einen lockeren Arbeitsstil.
He likes a relaxed work style.
In this example, 'lockere' describes 'Art' (way), implying a conversational and informal style.