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Unsubstantiation
- A divesting of substantiality.
Unsucceedable
- Not able or likely to succeed.
Unsuccess
- Want of success; failure; misfortune.
Unsuffering
- Inability or incapability of enduring, or of being endured.
Unsuit
- Not to suit; to be unfit for.
Unsurety
- Want of surety; uncertainty; insecurity; doubt.