Eldamo : Sindarin : ui-

S. #ui- pref. “twi-” (Category: Two)

S. #ui-, pref. “twi-, [G.] bi-, di-” (Category: Two)

A prefix for “twi-” appearing in The Etymologies of the 1930s under the root ᴹ√YŪ “two, both” as an element in N. uial “twilight” (Ety/YŪ). Tolkien’s continued use of S. uial “twilight” in his later writings indicates the ongoing validity of this prefix (LotR/1111.2805; PE17/153, 169).

Conceptual Development: The Gnomish Lexicon of the 1910s had G. gwi- “twi-, bi-, di-” based on primitive ᴱ✶u̯i and related to the dual suffix G. -wi (GL/45).

Reference ✧ LotR/1111 ✧ “twi-”

Element In

S. uial “twilight, evendim” ✧ LotR/1111

Derivations

< √YU “both”

N. ui- pref. “twi-” (Category: Two)

See S. #ui- for discussion.

Reference ✧ Ety/YŪ ✧ “twi-”

Element In

N. uial “twilight” ✧ Ety/YŪ

Cognates

ᴹQ. yú- “both” ✧ EtyAC/YŪ (yū-)

Derivations

< ᴹ√YŪ “two, both” ✧ Ety/YŪ

Phonetic Developments

ᴹ√YŪ > ui-

[jūju] > [jūjo] > [juio] > [uio] > [ui]

✧ Ety/YŪ

G. gwi- pref. “twi-, bi-, di-” (Category: Two)

See S. #ui- for discussion.

References ✧ GL/45, 74

Glosses

“twi-, bi-, di-” ✧ GL/45

gwi- “twi-, bi-, di-” cp. -wi ✧ GL/45
uith “both” cp. gwi- ✧ GL/74

Derivations

< ᴱ✶u̯i ✧ GL/45
- < ᴱ√WI¹ “dual”