and ↓ايِسٌ [Despairing]; particle ns. of أَيِسَ. (Msb.)
2.
[Hence,] ايِسَةٌ [and according to Golius ↓أَيْسَاءُ, both properly meaning Despairing of the recurrence of the menstrual flux;] who has not menstruated in a period of five and fifty years. (KT.)