Inferior (adjective)

1. Lower in rank, status, or quality.
2. Less important, valuable, or good than others of its kind.
3. Lower in position, rank, or grade.
4. Of lower standard or quality than is required or expected.

Origin:

Late middle english (in the sense "lower in position"): from latin, comparative of inferus "lower", from infra "below".

Examples:

1. The new model is inferior to the previous one in terms of features and performance.
2. His inferior knowledge of the subject made him incapable of leading the project.
3. The inferior materials used in construction led to the building's collapse.
4. The inferior product failed to meet the required specifications.
5. His inferior skills made him unable to compete with the other players.