Sacrificial (adjective)

1. Relating to or involving sacrifice, especially the ritual killing of an animal or person as an offering to a deity.
2. Given or done as a sacrifice, especially in order to achieve a particular end.
3. Actions or events that are necessary to achieve a particular end, but which are costly or painful.

Origin:

Late middle english: from old french, or from latin sacrificium (see sacrifice) + -al.

Examples:

1. The sacrificial lamb was offered to the god.
2. The soldiers were asked to make a sacrificial effort.
3. The company made a sacrificial investment in research and development.
4. It was a sacrificial move to protect the team.
5. The government made a sacrificial decision to cut funding for certain programs.