diaphanous

The word 'diaphanous' traces its lineage to the Greek diaphanēs, meaning "showing through," itself a compound of dia- ("through") and the verb phainein ("to show"). This literal sense of allowing light to pass through and thus making objects visible on the other side was preserved as the term entered Late Latin as diaphanus. Borrowed into English in the early 17th century, it initially described materials like gauze or silk. Over time, its application broadened metaphorically to describe anything so delicate or vague it seems intangible, such as a diaphanous argument, maintaining the core logic of something through which the essence or outline of another thing can be perceived.

Structure: dia (through) + phan (show) + ous (adjective suffix) dia: Greek origin, meaning "through, across, thoroughly." A prefix indicating transference or completion. phan: Greek origin, from the root phainein, meaning "to show, to bring to light, to appear." ous: English suffix of Latin origin (-osus), forming adjectives meaning "full of, characterized by, having the qualities of."