Does using two synonyms together always assert the meaning of the word?
I come across this a lot while reading.
The skin was like faded parchment with an arrangement of puckers and wrinkles which created between them an expression of fathomless inscrutability
Here 'fathomless' and 'inscrutable' almost mean the same thing, to wit, the former means undecipherable and the later that cannot be easily understood; completely obscure or mysterious; unfathomable; enigmatic