Where does “słowko” come from?

słowko (Lower Sorbian) comes from Lower Sorbian słowo, from Proto-Slavic slȍvo, from Proto-Indo-European ḱléwos, from Proto-Indo-European ḱlew-, from Proto-Indo-European ḱel- — to cover; to incline.

Ancestry of “słowko”, step by step

Step	Language	Word	Meaning
1	Lower Sorbian	słowo	word
2	Proto-Slavic	slȍvo	word
3	Proto-Indo-European	ḱléwos	fame
4	Proto-Indo-European	ḱlew-	to hear
5	Proto-Indo-European	ḱel-	to cover; to incline

Every word from Proto-Indo-European ḱel- →Every word from Proto-Indo-European ḱlew- →Every word from Proto-Indo-European ḱléwos →