paq'batlh:

> qeylIS tIghmey'e' DaH tIQoy

> teH tIghmey 'ej bIH bolIjlaHbe'

> Hear now, […] The ways of Kahless,

> For they are true And unforgettable. PB 

I can't understand, how this use of "true", is any different from the "true" of "true love, true hate, true light, etc"..

Perhaps, since english isn't my native language, I can't perceive the difference. But you bet your bird of prey, that I can't *feel* any difference whatsoever.

Can someone shed some light on all this ?

Dictionary.com lists 17 different senses of the adjective true: https://www.dictionary.com/browse/true?r=75&src=ref&ch=dic

I don't see that we have much evidence to say which ones of those teH means. I'm sure it only means some of them, but picking which is tricky. I would not be so quick to assume that teH means only conforming to reality and not genuineness.

-- 
SuStel
http://trimboli.name