Quenya 

remma

noun. snare, snare, *trap

A noun glossed “snare” in notes on The Rivers and Beacon-hills of Gondor from 1967-69 based on the root √REM or √REB “entangle, snare, trap (as hunters or fishers) with lines or nets”, whose other derivatives include S. remmen “meshed, netted, entangled” and S. Remmirath “Netted Jewels” (VT42/12).

Conceptual Development: Earlier “snare” words include ᴱQ. lak (laq-) “snare” in the Qenya Lexicon of the 1910s under the early root ᴱ√LAQA “catch” (QL/51), and ᴹQ. neuma “snare” in The Etymologies of the 1930s under the root ᴹ√SNEW “entangle” (Ety/SNEW).

Neo-Quenya: I would not use ᴱQ. lak for purposes of Neo-Quenya, but I think ᴹQ. neuma can be salvaged. Its Noldorin cognate N. hniof had the additional gloss “noose”, so I think neuma would apply mainly to nooses and noose-like traps. Conversely, the derivatives of √REM had mostly to do with nets, so I would use remma as a “snare” for net-like traps. I would also use remma as a more general word for “✱trap”, including metaphorical traps like ambushes or “traps” within debates on words. For an actual “net” I would use rembë.

remma

snare

remma noun "snare" (VT42:12)

neuma

snare

neuma noun "snare" (SNEW)

rem-

verb. snare

#rem- vb. "snare"; cited in the form "remi-", apparently including the connecting vowel of the aorist tense (as in *remin "I snare"). (VT42:12)