-isht

from Proto-Albanian *-sta- from Proto-Indo-European *-stā.^[1] unrelated to Slavic -ište as it developed from Proto-Slavic *-išče.

-isht m (-sh m)

1. used to form secondary suffix.

-isht

1. Forms adverbs from adjectives. Frequently corresponds to English -ly

   ‎absolut + ‎-isht → ‎absolutisht (“absolutely”)

   • Note that adjectival suffixes are dropped when -isht is added.

   ‎përgjithshëm + ‎-isht → ‎përgjithësisht (“generally”)

   ‎jashtëzakonshëm + ‎-isht → ‎jashtëzakonisht (“unusually”)