istyar noun "scholar, learned man" (IS). According to VT45:18, Tolkien at one point also meant istyar to be the name of Tengwa #13 with overposed dots to indicate a palatal sound; the letter would thus have the value sty. However, according to the classical Tengwar spelling of Quenya as outlined in LotR Appendix E, such a letter would rather have the value *nty (since #13 is there assigned the value nt in Quenya).
Sindarin
golodh
lore-master
golodh
noun. lore-master, sage
pl1. glydh {ð} n. lore-master, sage. Historical form obsolete as specific 'tribal' or general, except as element in certain proper-names. It was used of any sage or lore-master.Q. ñoldo. >> pengolodh