able, accepted, acknowledged, admitted, affirmed, agreed, airtight, allowed, approved, arranged, auricular, authenticated, avowed, between us, certified, close, compact, compacted, conceded, confessed, confidential, confirmed, contracted, countersigned, covenanted, dustproof, dusttight, endorsed, engaged, enigmatic, esoteric, fast, firm, gasproof, gastight, granted, hermetic, hermetically sealed, in petto, incalculable, incognizable, inside, lightproof, lighttight, mysterious, not for publication, notarized, off the record, oilproof, oiltight, privileged, professed, promised, puzzling, rainproof, raintight, ratified, received, recognized, settled, shut fast, signed, smokeproof, smoketight, snug, stamped, staunch, stipulated, stormproof, stormtight, strange, sworn and affirmed, sworn to, tight, unapparent, unapprehended, unascertained, unbeknown, uncharted, unclassified, under privilege, undertaken, underwritten, undisclosed, undiscoverable, undiscovered, undivulged, unexplained, unexplored, unexposed, unfamiliar, unfathomed, unheard, unheard-of, unidentified, uninvestigated, unknowable, unknown, unperceived, unplumbed, unpublishable, unrevealed, unsuspected, untouched, validated, virgin, warranted, water-repellant, waterproof, watertight, windproof, windtight

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