Quenya 

ahtarië

verb. reaction; vengeance

@@@ NQ-Wiki used this for “reaction” and NQNT used this for “vengeance”. I’d limit it to “reaction” since the meaning of the Quenya elements are inappropriate for “revenge”

Elements

WordGloss
ahtar-“to do back, react; to requite, avenge”
Quenya Group: Eldamo - neologism/reconstructions. Published by