thross

noun. whispering or rustling sound

thross

noun. whisper or rustling sound

thloss

noun. whisper or rustling sound

lhoss

noun. wilderness

floss

noun. whispering or rustling sound

The Etymologies of the 1930s had N. thloss > floss “whispering or rustling sound” based on the root ᴹ√SLUS “whisper”, along with a variant N. thross based on the related root ᴹ√SRUS (Ety/SLUS). Both these nouns reflect the 1930s phonetic development of sl, sr > thr, thl, as well as initial thl > fl.

Neo-Sindarin: In Sindarin of 1950s and 60s initial sl, sr > lh, rh, so I would replace these 1930s nouns with ᴺS. lhoss “whispering or rustling sound”, as suggested in HSD (HSD).

Conceptual Development: Earlier words of similar meaning include G. cwithri “whisper” related to G. cwitha- “murmur, whisper” (GL/29) and G. rui “whisper” related to G. ruitha- “whisper, rustle” (GL/66), both from the Gnomish Lexicon of the 1910s. Another possible precursor from the Gnomish Lexicon is G. suss “hush, sudden quiet” (GL/68).

floss

noun. whisper or rustling sound