Imperceptibly(adverb)
In a very small way that cannot be seen or felt.
Hindi meaning:अलक्षित रूप से
Synonyms: Gradually, Unnoticeably, Invisibly, Scarcely
Antonyms: Noticeably, Perceptibly, Obviously, Observably
Example: The daylight faded almost imperceptibly into night.
Trick to remember: Per jo Dikha nhi Imperceptibly hogyi. 
