arm, skill
腕（うで）、腕前（うでまえ）、腕時計（うでどけい）
arm, skill, wristwatch
On-reading (ワン) is used in compounds; kun-reading (うで) is used standalone or with okurigana. Appears in many compounds — memorize the key ones rather than the kanji in isolation.
From the JLP Quiz question bank — the word in the form it is actually tested in.
この人は今、料理の腕はどうですか。
Answer: 友達に手料理をふるまうこともある
