This is the 9690th most frequent Turkish word.
anın
"Anın" means "of the moment" or "your moment" in English, depending on context.
In this sentence, "anın" is the genitive form of "an (moment)", meaning "of the moment" and it implies possession.
Bu anın değerini bil.
Appreciate the value of this moment.
Here, "anın" again depicts possession, specifying "your moment".
Senin o anın kesinlikle hatırlanmalı.
That moment of yours must definitely be remembered.
The usage of "anın" here indicates the genitive form, linking "moment" with "emotions" to express a possessive relation.