Ooops, forgot to add the chorus:

Siuil, siuil, siuil, a run
Siuil go socair, agus siuil go ciun
Siuil go doras agus ealaigh liom
Is go dtearn tu, a mhuirnin, slan.

(meaning: go, go, go, darling; go softly and go silently; go to the door and return to me, and may you go, my darling, safely) Siuil means literally "walk", a run means literally "o secret", and is a common caress-word in Irish.