The letter U brings us a word with 2 meanings when used as an adjective:

Ultimate can mean

1. being the last (final) part of a process or series; or
2. being the best or most extreme of an example.

Example Sentences

1. The ultimate decision on whether to enforce this policy lies with the management.
2. Next Tuesday, we will have our ultimate session in this series of lectures on Global Warming.
3. The board of directors decided that the ultimate goal at this pandemic is the safety of the staff.
4. In international relations, war is the ultimate result when communication fails.
5. His ultimate goal is to set up his own business.
6. The author announced that the ultimate part of her trilogy will be published next year.

A little side note:

The part or item that is second last is described as the penultimate.

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