Result of a wrong segmentation of two suffixes in Upper German dialects of Middle High German: -ec (modern -ig) and -heit: -ec-heit was interpreted as -e-keit.. Later this phenomenon spread to other suffixes, and even to Central German dialects, in which the equivalents of -ig had never been pronounced with a final [k]-sound. (Compare the modern standard pronunciation of -ig [-ɪç].)
-keit f (plural -keiten)
- Alternative form of
- wirksam (“effective”) → Wirksamkeit (“effectiveness”)
- See -heit for notes on the use of the two variants.