A root in Late Notes on Verb Structure (LVS) from 1969 described as meaning “believe (that statements, reports, traditions, etc. are) true, accept as fact”; it served as the basis for Q. sav- of the same meaning (PE22/158).
Primitive elvish
bē
preposition. as, like
sab
root. believe (that statements, reports, traditions, etc. are) true, accept as fact
ñgōlē
noun. Science/Philosophy as a whole
ā̆
preposition. as for, as regards, with reference to
mal(a)tā Reconstructed
noun. gold (as metal)
dē
preposition. with
Tolkien used the word Q. ve for “as, like” in Quenya for much of his life, but its etymological origins varied. In the the Qenya Lexicon of the 1910s, Tolkien had two distinct roots for “similarity”: unglossed ᴱ√SĒ with variant ᴱ√SENE⁽²⁾ and derivatives like ᴱQ. se “as, like, in manner of” and ᴱQ. (a)sesta- “to liken, compare” (QL/82), and also ᴱ√VĪ “as” with variant ᴱ√VI‘I and derivatives like ᴱQ. ve “as, like”, ᴱQ. vealta- “to resemble”, and ᴱQ. vīkana- “compare” (QL/101). The semantic distinction between the two roots isn’t clear, and in the contemporaneous Gnomish Lexicon there was a third set of forms beginning with fel- such as G. fel “as, like”, G. feleg “equal”, and G. feltha- “resemble, seem like” (GL/34).
In later notes Tolkien proposed a variety of primitive origins for Q. ve “as, like”: ✶wē (we’e) in 1957 Quenya Notes (VT49/10; PE17/189), ✶bē from notes from the late 1950s or early 1960s (VT49/32 note #10), and ✶vai as a relative of suffixal -va in notes from 1968 (VT49/32 note #10). As there are not any definite Sindarin cognates for Q. ve in Tolkien’s published writings, it is hard to know which of these is more likely.
Neo-Eldarin: For purposes of Neo-Eldarin, I would go with primitive ✶bē as the most widely excepted option, producing S. ✱be “as, like”.