Must
Part of speech: verb
Definition: To do with certainty; . To do as a requirement; .
Part of speech: noun
Definition: Something that is mandatory or required. Something that exhibits the property of being stale or musty. Fruit juice that will ferment or has fermented, usually grapes. A time during which male elephants exhibit increased levels of sexual activity and aggressiveness (also musth).
Example sentence: Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth.
Mustiness
Part of speech: noun
Definition: The characteristic of being musty.