Imperfect (adjective)

1. Having faults or flaws; not complete, perfect, or whole.
2. Not being complete in all its parts; lacking some aspect or feature.
3. Not having all the necessary qualities for a particular purpose; inadequate.

Origin:

Late middle english: from old french, or from latin imperfectus, from in- 'not' + perfectus 'completed'.

Examples:

1. The car was imperfect and had a few dents and scratches.
2. The painting was considered imperfect because of the missing section.
3. The system was imperfect and required several upgrades.
4. His vision was imperfect and he couldn't see the details clearly.
5. The plan was imperfect and had several loopholes.