See the entire entry for šnn vb. D to sharpen TgJ Ez21:14 :וְחַרבָא דְבנֵי עַמוֹן תִתנֵי/תְתַנֵי/ וֻתשֵיצֵי : [~MT חֶרֶב הוּחַדָּה וְגַם־מְרוּטָה]
See the entire entry for tny#3 vb. D to sharpen, make pointed (??)