آنَ: حَانَ to come, approach, draw near; to mature, ripen, become ripe

آنَ الأوَانُ the time has come, it is time, it is high time, now is the time

آنَ لَكَ أنْ.. it is time for you to.., the time has come for you to..

أمَا آنَ لَكَ أنْ تَفْهَمَ؟! haven't you understood yet?!