This is the 1116th most frequent German word.
teurer
"Teurer" means "more expensive" in English.
Here, 'teurer' is the comparative form of the adjective 'teuer' (expensive), showing a comparison in price.
Das Auto ist teurer als das Fahrrad.
The car is more expensive than the bicycle.
In this case, 'teureren' is a comparative form used in the plural adjective form, modifying 'Geschenke' (gifts).
Die teureren Geschenke werden oft weniger geschätzt.
The more expensive gifts are often less appreciated.
Here, 'teurer' is used in its standard adjective form to describe 'Fehler' (mistake), meaning costly or dear.