光滑 (guāng huá): glossy; sleek; smooth

The baby's skin was as smooth as cooked egg white; once Mom touched it gently, she couldn't bear to let go.

Grandpa polished the mahogany table until it was bright and smooth; you could even see the wood grain clearly.

This pebble had been washed by the river for decades, and its surface became very smooth; it felt as cool as jade to the touch.

The newly laid floor tiles were so smooth that I almost slipped while walking on them in socks; I quickly grabbed the wall.