sain
verb
ˈsān 
sained; saining; sains
transitive verb
1
dialectal British : to make the sign of the cross on (oneself)
2
dialectal British : bless
Word History
Etymology
Middle English, from Old English segnian, from Late Latin signare, from Latin, to mark — more at sign
First Known Use
before the 12th century, in the meaning defined at sense 1