_v. _make run, specially of riding horses or other animals. Q. norta-. >> nor-
Sindarin
northa-
verb. to make run, to make run (of horses and animals), *ride; [G.] to send rolling [as a vehicle], speed
northa-
verb. make run
Quenya
norta-
make run, specially used of riding horses or other animals
norta- vb. (1) "make run, specially used of riding horses or other animals", onortanen rocco "I rode a horse", nortanen "I rode" (with ellipsis of object; the prefix o- must apparently be included if the animal one rides on is mentioned as a direct object) (PE17:168)
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
Gnomish
northa-
verb. to send rolling, speed
A causative verb in notes from the late 1950s or early 1960s based on the root √NOR “run”, meaning “make run, specially used of riding horses or other animals” so probably also having the sense “✱ride” like its Quenya cognate Q. norta- (PE17/168).
Conceptual Development: The Gnomish Lexicon of the 1910s had G. northa- “to send rolling, speed” (GL/61), clearly based on the early root ᴱ√NORO “run, go smoothly, ride, spin” (QL/67). This early root had other derivatives like G. norn “wheel”.
Neo-Sindarin: I let the root √NOR retain the sense “roll” for purposes of Neo-Eldarin, so I would keep the sense “send rolling, speed” for S. northa- as well, using it for both “ride [an animal]” and “ride [a vehicle]”.