A noun for “wound” derived from the root ᴹ√SKAR (Ety/SKAR). Apparently the initial [sk-] became syllabic [ṣk-], which then became [esk-]. Afterwards the [[ilk|[esk] became [esg]]].
Doriathrin
esgar
noun. reed-bed
esgar
noun. wound
esgaroth
place name. Reedlake
A noun for “reed-bed”, apparently an elaboration of Ilk. esg “reed” (Ety/ESEK). In a hastily written entry in The Etymologies, a similar form esgar was glossed “shore” as a derivative of the root ᴹ√SKAR, but with no language specified (EtyAC/SKAR²). If it was Ilkorin, it probably underwent the same development as esgar “wound”. Both these words appeared to have been coined to explain the name of the town Esgaroth from the Hobbit.