This is the 14090th most frequent German word.
gering
Small, low, slight, or minimal.
Here, 'gering' is used as an adjective describing the probability, indicating its small amount or value.
Die Wahrscheinlichkeit, dass es heute regnet, ist sehr gering.
The probability of rain today is very low.
In this sentence, 'gering' characterizes the extent of knowledge, suggesting it is minimal or not substantial.
Seine Kenntnisse in dieser Sprache sind leider gering.
His knowledge of this language is unfortunately limited.
The word 'gering' modifies the quality, implying it is on the lower end or insufficient.