seche a hide, skin [230].
ségainn accomplished; an accomplished person, n. pl. ségainni, [89] (ségaind M ségainn N); ní rabha i nEirinn uile budh griabhdha nó bud segaine inás, Three Fragm. 34.
seim a rivet [172].
seol (seola) child-bed [224].
sírecht f. a tabu, .i. geis, O'Dav. 1482, who quotes triad [253].
sirite m. a wild man, sprite [114].
sit hush! [137]; sit sit! Hib. Min. 78, 23.
sleith f. cohabiting with a woman without her knowledge [155]; Aisl. M. O'Dav. 97.
slissén a chip, lath [169].
snáth f. a thread, gen. snáithe [75].