Noldorin
rosta-
verb. to hollow out, excavate
rosta-
verb. to hollow out, excavate
Cognates
- ᴺQ. rosta- “to hollow out, excavate”
Derivations
Element in
- ᴺS. thindrostir “badger”
Phonetic Developments
Development Stages Sources On. rostóbe > rosto [rosta-] ✧ Ety/ROD
rhaudh
adjective. hollow, cavernous
A verb in The Etymologies of the 1930s appearing in its [Noldorin] infinitive form rosto, glossed “to hollow out, excavate” and derived from the root ᴹ√ROD “cave” (Ety/ROD). Likely its primitive form was ✱rod-tā, where d+t became st in ancient Elvish.
Conceptual Development: The Gnomish Lexicon of the 1910s had G. tumla- {“dig a hole, excavate” >>} “excavate, hollow out” (GL/72), likely derived from the early root ᴱ√TUM(B)U having to do with hollow things, as suggested by Christopher Tolkien (LT1A/Tombo; QL/095).