TN Deut33:25 :סיבותיהון‏ :
See the entire entry for saybū/sēḇū, saybūṯā/sēḇūṯā n.f. old age

TN Deut33:25 :וכיומי עולימותיהון‏ : like the days of their youth
See the entire entry for ˁŭlaymū, ˁŭlaymūṯā n.f. youthfulness