A basic verb for “snare” appearing in its aorist stem form remi- in notes on The Rivers and Beacon-hills of Gondor from 1967-69, a derivative of the root √REM “entangle, snare, trap (as hunters or fishers) with lines or nets” (VT42/12).
Neo-Quenya: For purposes of Neo-Quenya, I would assume the Quenya verb could also mean “✱entangle, trap”. However, Tolkien may have intended this verb only to mean “✱trap with a net”.
#rem- vb. "snare"; cited in the form "remi-", apparently including the connecting vowel of the aorist tense (as in *remin "I snare"). (VT42:12)