This is the 12635th most frequent Polish word.
nekrolog
Obituary.
The word 'nekrolog' here refers to an obituary, a notice of someone's passing accompanied by a tribute, as found in newspapers.
Nekrolog upamiętniał życie znanego artysty.
The obituary commemorated the life of a famous artist.
In this sentence, 'nekrologi' refers to the plural form of obituary, indicating multiple death notices.
W gazetach można znaleźć nekrologi każdego dnia.
In newspapers, obituaries can be found every day.
Here, 'nekrologu' is used in the genitive singular form, referring to the structure of such a text.