This is the 4581st most frequent Polish word.
lęk
Fear; anxiety.
In this sentence, 'lęk' describes a broader, generalized worry or concern about something conceptual.
Jego lęk o przyszłość był zrozumiały.
His anxiety about the future was understandable.
Here, 'lęk' is depicted as an inhibiting factor causing avoidance or indecision.
Przez lęk nie podjął decyzji.
Due to fear, he did not make a decision.
Here, 'lęk' is used as a noun indicating an internal feeling of apprehension towards a specific situation.