Sindarin 

achar-

verb. to avenge, do back, react, requite

A verb meaning “to avenge”, derived from the Sindarin-only root √AK “hostile return” (PE17/167), probably in combination with ✶kar- “to do” and hence literally “do back with hostility”.

Conceptual Development: The initial element of this word was first derived from √AT “again” (PE17/166). Apparently the prefix ✶at- (also meaning “twice”) did not have the connotation Tolkien wanted, because he rejected this etymology, and went on to explore several different possible primitive forms meaning “back (again)”. Among these discussions, he coined the new root √AK, from which he derived the related Sindarin words acharn “(act of) revenge” and achared “vengeance”. The latter is clearly the gerund of achar-, so it seems this was also the new derivation of this verb.

Sindarin [PE17/166; PE17/167] Group: Eldamo. Published by

achar-

do back

_ v. _do back, react; requite; avenge. Q. _akkar _or ahtar. Tôl achar 'vengeance is coming'. . This gloss was rejected.

Sindarin [(PE17 Sindarin Corpus) PE17:166] < AT 'back', an action by _another agent_ in return to a previous action + ?. Group: Parma Eldalamberon 17 Sindarin Corpus. Published by

acharn

noun. vengeance, (an act of) revenge

Sindarin [PE17/166; PE17/167; WJ/254] Group: Eldamo. Published by

acharn

noun. vengeance

Sindarin [WJ/254, WJ/301] OS *akkʰarna, CE *atkarnâ "reaction". Group: SINDICT. Published by

acharn

noun. vengeance

n. (an act of) vengeance.

Sindarin [(PE17 Sindarin Corpus) PE17:167] < AK of hostile return. Group: Parma Eldalamberon 17 Sindarin Corpus. Published by

achared

noun. vengeance

Sindarin [PE17/167] Group: Eldamo. Published by

achared

noun. vengeance

_n. _vengeance.

Sindarin [(PE17 Sindarin Corpus) PE17:167] < AK of hostile return. Group: Parma Eldalamberon 17 Sindarin Corpus. Published by

acharn

vengeance

acharn (pl. echern)

acharn

vengeance

(pl. echern)

tôl acharn

vengeance comes

@@@ Tûl acharn

Sindarin [PE17/166; WJ/254; WJ/301] Group: Eldamo. Published by