sealed (adj.)
- able
- accepted
- acknowledged
- agreed
- airtight
- allowed
- approved
- arranged
- auricular
- authenticated
- avowed
- certified
- close
- compact
- confessed
- confidential
- confirmed
- contracted
- engaged
- enigmatic
- esoteric
- fast
- firm
- granted
- hermetic
- incalculable
- incognizable
- inside
- lightproof
- mysterious
- privileged
- professed
- promised
- puzzling
- rainproof
- ratified
- received
- recognized
- settled
- signed
- snug
- staunch
- stormproof
- strange
- tight
- unapparent
- unbeknown
- uncharted
- unclassified
- undisclosed
- undiscoverable
- undiscovered
- unexplained
- unexplored
- unfamiliar
- unfathomed
- unheard
- unheard-of
- unidentified
- unknowable
- unknown
- unperceived
- unplumbed
- unpublishable
- unrevealed
- unsuspected
- untouched
- validated
- virgin
- warranted
- waterproof
- watertight
The Smiths never had any arms, and have invariably sealed their letters with their thumbs.