Dictionary

To imply or require.

Example: This activity will entail careful attention to detail.

To settle or fix inalienably on a person or thing, or on a person and his descendants or a certain line of descendants; -- said especially of an estate; to bestow as a heritage.

To appoint hereditary possessor.

To cut or carve in an ornamental way.

That which is entailed. Hence:

Delicately carved ornamental work; intaglio.