This is the 807th most frequent Catalan word.
tanta
The Catalan word "tanta" means "so much" or "so many" in English, often used as a feminine singular form.
The word 'tanta' is used as an adjective in this sentence to emphasize the amount of joy (a feminine singular noun) observed, signifying 'so much' or 'such a lot of'.
No havia vist mai tanta alegria en una festa.
I had never seen so much joy at a party.
Here, 'tanta' modifies 'feina', which is a feminine singular noun, to indicate an excessive amount, conveying exasperation or surprise.
Tanta feina per no res!
So much work for nothing!
In this case, 'tanta' acts as an adjective preceding 'pressa' (feminine singular noun), illustrating the great extent of urgency or haste in a figurative sense.