After winning the lottery she beamed with joy, unable to hide her excitement.
Tips
history
From 唐·吴兢《贞观政要·纳谏》: 太宗闻其言,喜形于色 — the Tang emperor Taizong, upon hearing wise counsel, 'showed his joy on his face.' 形 here means 'to manifest,' 色 means 'facial expression.' Antonym: 不动声色 (búdòngshēngsè, betraying nothing).