Campbell Weak declension
Nouns of Dental relationship stems Hogg Consonantal stems (r-stems) (p-stems) fin-stems: on-stems, Fn- stems all the equivalents of Campbell's minor declensions) Campbell Stems in Indo-European nd-stems Athematic nouns -es-, -os- Hogg s-stems nd-stems Root-stems Table 4.
These classes are briefly reviewed in order to show how they gave way to the weak declension
(-ed) over a period of 1500 years.
The exponent of stem formation of the weak declension in Indo-European is traditionally reconstructed as being realized as [-en-] (and ablaut variants).
However, it is apparently a conversion that targets the weak declension.
That is, say the weak declension is a target for agentive conversions.
The impact of weak declension
is most evident in forms of the genitive pl.