This is the 18093rd most frequent Polish word.
żółtych
"Żółtych" means "yellow" (plural genitive or plural accusative form) in English.
The word 'żółtych' describes the flowers as yellow and is declining to match the genitive plural case.
Widzę żółtych kwiatów w ogrodzie.
I see yellow flowers in the garden.
Here, 'żółtych' describes the cars as yellow and matches the genitive plural case because of comparison.
Żółtych samochodów jest więcej niż czerwonych.
There are more yellow cars than red ones.
In this sentence, 'żółtych' describes the canaries and is used in the accusative plural case due to the direct object.