彼は謹厳な態度で式に臨んだ。
He attended the ceremony with a grave, solemn bearing.
祖父は謹厳な人で、冗談ひとつ言わなかった。
My grandfather was a stern man who never cracked a single joke.
謹厳実直な人柄が上司に信頼されている。
His earnest, upright character has won his boss's trust.
いつもは謹厳な校長が、珍しく笑顔を見せた。
The usually stern principal broke into a rare smile.