This is the 1511th most frequent German word.
allzu
"Allzu" means "too much" or "overly."
In this sentence, 'allzu' enhances the adjective 'kalt' to emphasize the excessive cold state, used to express intensity.
Es ist allzu kalt draußen, um spazieren zu gehen.
It is far too cold outside to go for a walk.
Here, 'allzu' modifies the adverb 'viel', implying an excessive amount of money being spent, used for cautionary advice.
Du solltest nicht allzu viel Geld ausgeben.
You shouldn't spend far too much money.
In this case, 'allzu' is used to describe the level of 'spannend', suggesting it is not excessively thrilling, often used for moderate opinions.