Early Quenya
kastea
adjective. of the head; head-, capital, chief
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!
A word appearing as ᴱQ. kastea “of the head; head-, capital, chief” in the Qenya Lexicon of the 1910s, an adjectival form of ᴱQ. kas “head” (QL/045).
Neo-Quenya: Luinyelle and Arael proposed using ᴺQ. castëa to mean “top” in a 2022-05-23 post to the Vinyë Lambengolmor Discord Server (VLDS) based on Q. cas(ta) “to the top”. Like its English equivalent “top”, castëa may also be used to mean “prominent, chief” based on its Early Qenya glosses.