Strife (noun)

1. Violent or bitter conflict or dissension.
2. Great effort or exertion; struggle.

Origin:

Old english strīf "contention, rivalry", of germanic origin; related to dutch strijd and german streit.

Examples:

1. The country was torn by civil strife.
2. The strife between the two factions.
3. The strife and turmoil of the times.
4. He had to put up a constant strife to keep his job.
5. The strife of everyday life.