Used as an article denoting a single, non-specific item.

एक

English Usage: I saw a cat in the garden.

Hindi Usage: मैंने बगीचे में एक बिल्ली देखी।

A colloquial form of "apply" used in some informal contexts.

आवेदन करना

English Usage: Did you ap for the job?

Hindi Usage: क्या आपने नौकरी के लिए आवेदन किया?