This is the 399th most frequent Hebrew word.
יחסית
Relatively.
In this sentence, 'יחסית' ('relatively') is used as an adverb to describe the degree to which the weather's pleasantness is notable in comparison to a usual or expected standard.
מזג האוויר יחסית נעים היום.
The weather is relatively pleasant today.
Here, 'יחסית' ('relatively') serves to adjust the adjective, indicating that the price is inexpensive in comparison to other prices.
המחיר של המוצר הזה הוא יחסית זול.
The price of this product is relatively inexpensive.
In this usage, 'יחסית ל' ('Relative to') introduces a comparison with another individual to emphasize a trait contrast.