Sindarin 

gaetha-

 verb. to offer, sacrifice

Sindarin [Eldamo] Group: Eldamo - neologism/reconstructions. Published by

Quenya 

yac-

verb. to offer, sacrifice

@@@ probably based on ᴱ✶dı̯ag- as suggested by Röandil in a discord chat from 2023-01-20

Quenya Group: Eldamo - neologism/reconstructions. Published by