Where does “sarar” come from?

sarar (Romansch) comes from Late Latin serare, from Latin sēra, from Latin serō, from Latin sērus, from Proto-Italic swerjos, from Proto-Indo-European swer-yo-s, from Proto-Indo-European swer- — to ache; to fester; wound; injury.

sarar (Romansch): to close

Definitions

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Ancestry of “sarar”, step by step

Step	Language	Word	Meaning
1	Late Latin	serare	fasten, bolt; second-person singular present...
2	Latin	sēra	a bar or bolt for fastening doors
3	Latin	serō	to sow, plant
4	Latin	sērus	late, too late
5	Proto-Italic	swerjos	—
6	Proto-Indo-European	swer-yo-s	—
7	Proto-Indo-European	swer-	to ache; to fester; wound; injury

Every word from Proto-Indo-European swer- →Every word from Proto-Indo-European swer-yo-s →Every word from Proto-Italic swerjos →