Well done
I observed that you fell in a mistake in your issue and hope you will receive my reply
You said: Don`t say = The man was absorbed at his work
but say = The man was absorbed in his work
The mistake is
We don`t say at his work but we say at work
So the sentence after the correction will be
The man was absorbed in work
The words like work, bed and home is alike Examples
I will go home
It`s too late, go to bed now
Remember this wise..... Who he makes no mistakes makes nothing
I want to correct you
that`s all