Sár-stæf

According to the Old English Dictionary:

es;

sár-stæf

m. A term intended to pain, an insult, a reproach:--Godes andsacan sægdon sárstafum swíðe gehéton ðæt hé deáþa gedál dreógan sceolde God's adversaries said with bitter words, vehemently vowed, that he should suffer death, Exon. Th. 116, 10; Gú. 205. sar-stæf