Answer: solemn

AnswerCrossword Clue
SOLEMNGrave; mirthless
SOLEMNParadise Lost "Once ..."
SOLEMNLike many an oath
SOLEMNLike some oaths or vows
SOLEMNLike some oaths
SOLEMNFunereal
SOLEMNKind of oath
SOLEMNSaturnine
SOLEMNImposing
SOLEMNWhat Paradise Lost "Once" was
SOLEMNLike a high mass
SOLEMNAwe-inspiring
SOLEMNSober
SOLEMNGrave.
SOLEMNAwe-inspiring.
SOLEMNDeeply earnest.
SOLEMNHighly formal.
SOLEMNFormal.
SOLEMNLike some vows
SOLEMNReverential
SOLEMNLike an oath
SOLEMNType of occasion
SOLEMNLike moments of silence
SOLEMNQuietly serious
SOLEMNChurchly
SOLEMNType of promise
SOLEMNLike a judge?
SOLEMNSeriously serious
SOLEMNSober and grave
SOLEMNFormal and dignified
solemnserious (thoughtful or subdued in appearance)
solemngrave; serious
solemnformal or ceremonious
SOLEMNLong-faced
SOLEMNGloomy
SOLEMNVery serious
SOLEMNLike many oaths
SOLEMNExtremely earnest
SOLEMNNot at all light
SOLEMNMirthless