adj. 1
See-through, clear; having the property that light passes through it almost undisturbed, such that one can see through it clearly.
The waters of the lake were transparent until the factory dumped waste there.
adj. 2
Obvious; readily apparent; easy to see or understand.
His reasons for the decision were transparent.
adj. 3
See-through, clear; having the property that light passes through it almost undisturbed, such that one can see through it clearly. Of a graphical image or animated GIF, having parts that allow the background to show through.

Related words

Choose the right word

or Transparent?

There may be transparent integrity or transparent fraud.

J. C. Fernald, English Synonyms and Antonyms (1914)

Use in printed books, per decade from 1850 to 2019.

4 letters: open², thin¹
5 letters: clear¹, sheer¹, lucid², gauzy, filmy
6 letters: candid², serene², flimsy², glassy², limpid
7 letters: obvious³, evident³, hyaline
8 letters: straight¹, apparent³, gossamer³, pervious, vaporous, pellucid, cobwebby, luculent, relucent
9 letters: guileless², ingenuous⁴
10 letters: diaphanous⁴
11 letters: crystalline³, perspicuous
12 letters: transpicuous

The small number after each word is its number of syllables (open² = 2 syllables).