Driftwood is worn wood washed up on the beach by the sea. A piece of driftwood, collect driftwood, a driftwood fire.
Salt water and sand smooth and bleach it, which is why it looks the way it does and why people collect it. It burns with coloured flames from the salts in it, and it makes poor firewood indoors because those salts corrode a flue.
1noundriftwoodWorn wood washed up on the beach by the sea.
“She decorated the bathroom with shells and bits of driftwood she found on the beach.”
driftwood is wood.
From drift + wood.
Etymology from Wiktionary, CC BY-SA