This is the 4500th most frequent German word.
messen
"To measure."
Here, 'messen' is used metaphorically to evaluate or assess improvement or change in a non-physical context.
Wir messen unsere Fortschritte im Training jeden Monat.
We measure our progress in training every month.
This sentence uses 'messen' to describe the ability to quantify or determine the effectiveness or outcome of an idea or action, applied abstractly.
Er kann den Erfolg seines Plans nicht messen.
He cannot measure the success of his plan.
In this sentence, 'messen' is used in the literal sense of measuring the physical size or dimensions of something.