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!
valda
noun/adjective. worth; worthy, dear
vildi-
verb. to matter; to be of significance, worth, moment
An (impersonal?) verb appearing as ᴱQ. vildin “it matters, is of significance, worth, moment” in the Qenya Lexicon of the 1910s under the early root ᴱ√VḶŘḶ [VḶÐḶ] (QL/102).
Neo-Quenya: For purposes of Neo-Quenya, I would adapt this verb as ᴺQ. valda- “to matter; to be of significance, worth, moment” based on a Neo-Root ᴺ√BALAD.
manya
adjective. good (not evil)
vanya
adjective. good (not evil), holy
An adjective (and noun?) appearing as ᴱQ. valda “worth, worthy, dear” in the Qenya Lexicon of the 1910s under the early root ᴱ√VḶŘḶ [VḶÐḶ] (QL/102). It was mentioned in the contemporaneous Gnomish Lexicon in its stem form ᴱQ. vald- as the equivalent of G. bald (GL/23), elsewhere translated as “worthy, important; great, mighty” before being revised to G. {bald >>} bâl (GL/21).
Neo-Quenya: I would retain ᴺQ. valda “worth; worthy, dear” for purposes of Neo-Quenya based on a Neo-Root ᴺ√BALAD.