used in the compound 絪缊 yīn​yūn, referring to the primordial mist or the vital force of nature

天地絪缊，万物化淳。

an orange color, specifically a reddish-orange or brownish-orange hue

古人常以缊色形容这种赤黄色的丝帛。

coarse hemp or tangled hemp fibers, often used for clothing

古人常以缊袍代表生活清苦。

adjective · vague, mysterious, or profound in meaning

此书所述之理奥缊深邃，难以洞察。