Where does “ṡón” come from?

ṡón (Old Irish) comes from Old Irish són, from Latin sonus, from Latin sonō, from Proto-Italic *swonaō — to sound, resound.

Ancestry of “ṡón”, step by step

StepLanguageWordMeaning
1Old Irishsónclitic form of sodain
2Latinsonussound, noise; pitch; speech; tone, character,...
3Latinsonōto sound, resound, make a sound or noise (and various sounds in-context)
4Proto-Italic*swonaōto sound, resound
Every word from Proto-Italic *swonaō →Every word from Latin sonō →Every word from Latin sonus →