Meaning : With intention. In an intentional manner.
Example :
He used that word intentionally.
I did this by choice.
Synonyms : advisedly, by choice, by design, deliberately, designedly, intentionally, purposely
Without intention. In an unintentional manner.
She hit him unintentionally.Without advance planning.
They met accidentally.On purpose ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Hindi. On purpose ka matlab kya hota hai?