This is the 185th most frequent Arabic word.
صباح
"صباح" means "morning" in English.
Here, 'صباح' is used in a common greeting meaning 'morning.'
صباح الخير.
Good morning.
In this sentence, 'صباح' specifies the time of the day, here 'morning,' that is being described.
كان صباح اليوم مشرقًا.
This morning was bright.
The word 'صباح' refers to an extended period of morning here, denoted as 'early morning.'