Quenya 

martyaina melme

destined ("true") love

>> martya "(to) destine" >> -ina perfect passive participle >> melme "love"

anwa melme

true love

Third-party request for translation.

>> anwa "true, actual" >> melme "love"

Sindarin 

meleth marthannen

fated ("true") love

>> meleth "love" >> bartha "(to) doom" >> -nnen perfect passive participle