Middle Primitive Elvish
andā
adjective. long
andambundā
adjective. long-snouted
anad
root. *long
a
root. intensive prefix
e
root. intensive prefix
i
root. intensive prefix
tainā
adjective. long
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!
andā
adjective. long
andambundā
adjective. long-snouted
anad
root. *long
a
root. intensive prefix
e
root. intensive prefix
i
root. intensive prefix
tainā
adjective. long
An “intensive” root addition described by Tolkien in The Etymologies from the 1930s (EtyAC/A). It was one of two basic intensive mechanisms, along with the (syllabic) prefixed N- (EtyAC/N). The prefixed vowel a- seems to have been used originally in Primitive Elvish when the base vowel was a, and similarly with E and I (EtyAC/E; Ety/I²); whether this was also true of the vowels o, u is unclear, as Tolkien didn’t mention them. These various vocalic intensifications were frequently accompanied by dynamic lengthening (doubling), with the example given by Tolkien being: ᴹ✶parkā “dry” → ᴹ✶apparkā “very dry, arid” (> N. afarch).
In the case of e- and i-, the examples were dero, dise → ᴹ✶Endero, ᴹ✶Indise “groom, bride”; these examples indicate that other kinds of consonant fortifications were possible, in this case nasalization of stops, which often replaced consonant-doubling for voiced stops in Primitive Elvish.
Specifically in the case of a-, however, it seems it could be used as a general intensive that “was distinct in origin, though similar in function, to the prefixed basic vowel”. Why this was true of a- alone is not clear, but there seems to have been some complex interplay between the vocalic intensives and the intensives derived from syllabic initial ṇ-, with the net result that the intensive prefix in Q. became an-, am-, añ-, depending on the initial consonant.
See the entry on the Quenya comparative for a more detailed discussion of the conceptual development of intensives in Eldarin.