पक्का
Felt certain of success

खास  =  abstract particular
There are certain reasons why this information cannot be made public

निश्चित
Set aside certain amount each week

खास  =  creature particular
Certain person was phoned you

निश्चित  =  event
The date for the invasion is certain

कुछ  =  human
Certain members have not paid their dues

विश्वसनीय  =  human, state
He is one of the certain person of the company

पक्का  =  it matters
It is certain that he tried to go there

निश्चित  =  matters
He wants certain matters to solve

कुछ  =  quality, standard
There is a certain quality

खास  =  particular
There are certain reasons why this information cannot be made public

निश्चित  =  fixed
On a certain dat/for a certain amount

अनिवार्य  =  inevitable
He was certain to fail

नियत
Set aside certain amount each week

विश्वसनीय  =  reliable
A quick and certain remedy

पक्का  =  sure
It was certain she had seen it

निश्चित  =  sure
She was certain about her friends

निर्विवाद  =  unqestionable
It is certain that he tried

कोई  =  anybody
A certain person phoned you

कोई भी  =  anybody
Lady of certain age

निश्चित  =  clear
It's almost certain they're dead by now

कुछ  =  degree
He makes a certain profit form his business but he'll never be rich

निर्धारित
Set aside a certain sum each week

पक्का विश्वास  =  trust
I am certain he will come