Something that is mandatory or required.
Something that exhibits the property of being stale or musty.
The property of being stale or musty.
Fruit juice that will ferment or has fermented, usually from grapes.
To do as a requirement; indicates that the sentence subject is required as an imperative or directive to execute the sentence predicate, with failure to do so resulting in a failure or negative consequence.
To become musty.
Used to indicate that something that is very likely, probable, or certain to be true.
To do with certainty; indicates that the speaker is certain that the subject will have executed the predicate.
To make musty.
An item that one must own, or a feature that is essential to a service, etc.
Essential to own.