This is the 113th most frequent Vietnamese word.
chiếc
A classifier used for singular objects, often vehicles or items.
In this sentence, 'chiếc' is used as a classifier for the noun 'xe đạp' (bicycle), denoting a single object.
Tôi vừa mua một chiếc xe đạp mới.
I just bought a new bicycle.
Here, 'chiếc' acts as a classifier for 'găng tay' (glove), referring to one item of the pair.
Anh ấy làm mất một chiếc găng tay.
He lost a glove.
In this instance, 'chiếc' is used with 'lá' (leaf) to describe an individual leaf among many.