This is the 5536th most frequent Spanish word.
pijamas
Pajamas; sleepwear consisting of a two-piece outfit or nightclothes.
The word 'pijamas' here denotes a set of sleepwear clothing, commonly used as a plural noun in Spanish.
Mis pijamas son muy cómodos.
My pajamas are very comfortable.
In this context, 'pijamas' again appears as a plural noun referring to new sleepwear purchased.
Compré un par de pijamas nuevos en la tienda.
I bought a new pair of pajamas at the store.
Here, 'pijamas' is used as an object noun in a directive sentence advising someone to pack sleepwear.