An area of open land, especially one planted with crops or pasture.

A subject of study or activity.

विषय

English Usage: He is an expert in the field of artificial intelligence.

Hindi Usage: वह कृत्रिम बुद्धिमत्ता के क्षेत्र में विशेषज्ञ है।

The state of being efficient; the ability to accomplish something with the least waste of time and effort.

Performing tasks in a manner that minimizes waste.

कुशलता

English Usage: We need to focus on increasing our energy efficiency in the office.

Hindi Usage: हमें कार्यालय में अपनी ऊर्जा कुशलता बढ़ाने पर ध्यान केंद्रित करने की आवश्यकता है।