Univerbation offor(“on”) +‎inna(“the”,accusative plural)

• IPA^(key):[ˈɸor͈sn͈a]

forsna (triggers/h/-prothesis)

1. onto thepl
   • c. 800–825, Diarmait, Milan Glosses on the Psalms, published inThesaurus Palaeohibernicus (reprinted 1987, Dublin Institute for Advanced Studies), edited and with translations by Whitley Stokes and John Strachan, vol. I, pp. 7–483, Ml. 126^a4

     arna té .i. féithforsna muire

     so that it may not go, i.e. a calmover the seas