Whereas (conjunction)

1. In contrast to the fact that; while on the contrary.
2. In comparison to the fact that.

Origin:

Middle english, from old english hwǣr-as, from hwǣr where + -as -ever; akin to old high german hwer-es wherever.

Examples:

1. He is young, whereas his brother is older.
2. She is a vegetarian, whereas her husband is a meat eater.
3. The company is successful, whereas its competitors are struggling.
4. He is a hard worker, whereas his colleagues are lazy.
5. The weather is good, whereas yesterday it was rainy.