A word in Definitive Linguistic Notes (DLN) from 1959 for a “flower that opened and shut quickly with any change of light” based on √PIRI “blink” (PE17/146). This flower name was part of an attempt by Tolkien to come up with a new etymology for S. alfirin after he decided that √LA was not a negative element, so that alfirin could no longer mean “immortelle”.
Sindarin
pirin
noun. a flower that opened ans shut quickly with any change of light at [some? not?] even a pansy closed
pirin
noun. flower that opened and shut quickly with any change of light
pihen
juicy
*pihen (lenited bihen; pl. pihin). Suggested Sindarin form of ”Noldorin” pichen (LR:382 s.v. PIS).
pihen
adjective. juicy
pihen
juicy
(lenited bihen; pl. pihin). – Suggested Sindarin form of ”Noldorin” pichen (LR:382 s.v. PIS).
n. Bot. a flower that opened ans shut quickly with any change of light at [some? not?] even a pansy closed. Q. pirinde, pirne.