
Spurn
Emotional Weight
Using 'spurn' can indicate a strong rejection with emotional undertones, often because of disbelief or disdain. 
Intensity of Rejection
'Spurn' is more intense than a polite decline; it carries a sense of harshness or finality. 
Not Casual
'Spurn' is not used in casual conversation; it's more formal and emphasizes the act of rejection. 