Where does “kiecuska” come from?

kiecuska (Polish) comes from Polish -uszka, from Old Polish -uszka, from Old Polish -ucha, from Old Polish -ą, from Proto-Slavic -a, from Proto-Indo-European -ōd.

Ancestry of “kiecuska”, step by step

Step	Language	Word	Meaning
1	Polish	-uszka	—
2	Old Polish	-uszka	—
3	Old Polish	-ucha	forms nouns
4	Old Polish	-ą	forms third person plural of verbs
5	Proto-Slavic	-a	id
6	Proto-Indo-European	-ōd	—

Every word from Proto-Indo-European -ōd →Every word from Proto-Slavic -a →Every word from Polish -uszka →