きれい
綺麗（きれい）、華麗（かれい）、美麗（びれい）
beautiful/clean, gorgeous, beautiful
On-reading (レイ) is used in compounds; kun-reading (うるわ(しい)) is used standalone or with okurigana. Appears in many compounds — memorize the key ones rather than the kanji in isolation. This kanji forms verbs/adjectives with okurigana. Practice both the word form and compound forms.
