zero-grade

Etymology
From 🇰🇲, as in. Possibly after.

Noun

 * 1)  In Proto-Indo-European linguistics, an ablaut form of a root characterized by the absence of the basic ablauting vowel phonemes */e/ and */o/.

Translations

 * Danish: nultrin
 * Dutch:
 * German: Schwundstufe, Nullstufe