彼は不自然に笑い、まるで不安を隠そうとしているかのようだった.

He laughed unnaturally, as if he were trying to hide his anxiety.

彼の振る舞いには明らかな作為が感じられ、誇張された演劇性と奇妙な緊張感が伴い、彼の言葉の誠実さに影を落としていた。

His behavior displayed a palpable affectation, marked by exaggerated theatricality and a peculiar tension that overshadowed the sincerity of his words.

この絵は、形と色に見られる不自然さの深さで人々の目を引く。

This painting attracts attention due to the depth of unnaturalness in its shapes and hues.

彼の作品は、その不自然さと独創性で観客を驚かせた。

His work amazed the audience with its unnaturalness and originality.