Anything which is not commonly seen.

For example: Spotting a leopard or a python around our school is rare.

To understand a situation clearly.

For Example: After practicing, Seema realized that cycling is not so difficult. 

Mention to something or someone.

For Example: Refer to the dictionary if you don't understand the meaning of the word.

The way in which things or people are connected.

For Example: Diya has a good relationship with her neighbors.

Comparing things.

For Example: Shimla is relatively cold than Dahanu.

Connected or related to something.

For Example: Science is relevant to our day to day life.

Something that is laughable or meaningless.

For Example: It is ridiculous to think that men cannot cook.