Silk
noun
The kanji and the word are exactly the same. That means they share meanings as well.
Since this word is made up of a single kanji, it probably uses the kun'yomi reading. You did not learn this reading, so here's a mnemonic to help you:
Wearing silk is the key (き) to not being nude (ぬ). Wear it!
妻は、美しい絹のガウンを羽織って死んでいました。
My wife put on a beautiful silk gown and died.