This is the 799th most frequent Hindi word.
आप
"आप" in Hindi means "you" (formal/respectful).
Formal salutation indicating politeness and respect.
आप कैसे हैं?
How are you?
Possessive usage to indicate 'your' in a formal context.
आपका दिन शुभ हो।
Have a good day.
Used as the subject of the sentence in a polite manner to address someone.