An apparently verbal root as √SRIS “snow” appearing in etymological notes from around 1959 with derivatives like Q. hrisse “fall of snow” and Q. hríza “it is snowing”; it replaced a deleted root √SRITH “snow” (PE17/168).
Primitive elvish
is
root. know
ista-
verb. to know
sris
root. snow
tul-
verb. come, is coming, has come, is here, I come, have come
eke
root. it is open
lasa
adverb. not it = it is/was not so
eñ-
verb. to exist
ringi
root. cold
Tolkien used very similar forms for Elvish words for “cold” for all of his life. The earliest iteration of this root was unglossed ᴱ√RIŊI in the Qenya Lexicon of the 1910s with derivatives like ᴱQ. rin (ring-) “dew” and ᴱQ. ringa “damp, cold, chilly” (QL/80). The root had similar derivatives in the contemporaneous Gnomish Lexicon such as G. rî “coolness, cool” and G. ring “cool, cold” (GL/65). In The Etymologies of the 1930s Tolkien gave the root {ᴹ√RINGĀ >>} ᴹ√RINGI “cold” with derivatives like ᴹQ. ringe/N. rhing “cold” (Ety/RINGI; EtyAC/RINGI). Primitive forms ✶riñgi “chill” and ✶riñgā appeared in Common Eldarin: Noun Structure from the early 1950s (PE21/80), and Christopher Tolkien mentioned √ring as the basis for cold words in the Silmarillion Appendix (SA/ring).
lā-
verb. to not be
an
preposition. to
as(a)
preposition. and
barathī
noun. queen
imbi
preposition. between
khyē̆
pronoun. other person
khā
adverb. far
lossē
noun. snow
mai
adverb. well
manā
adjective. what
mat-
verb. to eat
mīni
preposition. between
mō
noun. person
ros-
verb. to rain
rossētā-
verb. to rain
san-
pronoun. that
si
root. know
srith
root. snow
uba-
verb. impend,be imminent,approach,draw near
us(u)kwē
noun. dusk
The root √IS was the basis for words having to do with “knowledge” for all of Tolkien’s life, as represented by the verb Q. ista- “to know” which likewise retained the same form and meaning for decades. The root first appeared as ᴱ√ISI in the Qenya Lexicon of the 1910s, where somewhat cryptically Tolkien said its Gnomish form was GIS or IS (QL/43). This is mysterious because there were no such Gnomish words beginning with gis- in the contemporaneous Gnomish Lexicon, but there is an Early Noldorin word ᴱN. gist- “to know” from the 1920s, probably derived from ᴱ✶ʒist- (PE13/144, 146); in this early period initial ʒ- > g- in Gnomish (PE12/17).
Tolkien seems to have abandoned this Noldorin variant, giving the root only as ᴹ√IS in The Etymologies of the 1930s (Ety/IS). In this form it continued to appear in Tolkien’s later writings (PE17/155; PE22/129; VT41/6; VT48/25). In one place Tolkien gave the root in inverted form √SI (PE22/134), and such an inversion appeared in some of its derivatives, such as Q. síma “imagination, mind” (VT49/16) and sinte the irregular past tense of Q. ista-. However, the majority of its derivatives are from √IS.