-d-

Proto-Athabaskan *də- (valency decrease), from Proto-Na-Dene *də- (signaling valency decrease); cognate with Haida -d-, Eyak -d-, and Tlingit -d- (reflexive suffix).

-d-

1. The -d- classifier or valence-change prefix, a detransitivizing prefix of active verbs that modifies the transitivity or valence and grammatical voice of a verb, occurs in most passive, mediopassive, reflexive, and reciprocal verbs that are derived from verbs with a -Ø- classifier. It produces the agentive passive verb forms.

   ‎-d- + ‎yizéés (“he's singeing it”) → ‎yidéés (“it's being singed”)

• -l-
• -ł-
• Ø