This is the 15329th most frequent German word.
unverlässlichen
Unreliable.
The word "unverlässlichen" is used to describe the noun "Rat" (advice), indicating that the advice is not dependable.
Ich kann mich nicht auf seinen unverlässlichen Rat verlassen.
I cannot rely on his unreliable advice.
Here, "unverlässlicher" modifies the noun "Freund" (friend) to convey that the friend is inconsistent or cannot be trusted.
Ein unverlässlicher Freund kann dich im Stich lassen.
An unreliable friend can let you down.
In this writing, "unverlässlichen" characterizes the noun "Vorhersagen" (predictions) as being inaccurate or lacking reliability.