Firm, solid, or not yielding to pressure.

Requiring a lot of effort; challenging.

कठिन

English Usage: The exam was hard, and many students struggled with it.

Hindi Usage: परीक्षा कठिन थी, और कई छात्रों ने संघर्ष किया।

A property of an object that is perceived by the sense of sight; hues like red, blue, etc.

A distinguishing feature or quality; type or kind.

प्रकार

English Usage: There are various colours of opinions on this topic.

Hindi Usage: इस विषय पर विभिन्न प्रकार की रायें हैं।

Emotionally or physically tough; showing no compassion or softness.

कठोर स्वभाव

English Usage: She had a hard demeanor that intimidated others.

Hindi Usage: उसकी कठोर स्वभाव से दूसरों में भय उत्पन्न होता था।