to direct a question to someone.

पूछना

English Usage: I will ask him about the meeting.

Hindi Usage: मैं उससे बैठक के बारे में पूछूँगा।

to request something formally.

अनुरोध करना

English Usage: Please ask for help if you need it.

Hindi Usage: कृपया अगर आपको जरूरत हो तो मदद के लिए अनुरोध करें।

an act of asking for something.

अनुरोध

English Usage: Her ask for a raise was surprising.

Hindi Usage: उसकी वेतन में वृद्धि के लिए अनुरोध आश्चर्यजनक था।