虚度年华xū dù nián huá

fiddle about (/away);idle (/fritter/dawdle/fool/loaf) away one’s time;pass one’s life in a good-for-nothing way; waste one’s time (/life)
❍ 当他回首往事的时候，不因～而悔恨，也不因碌碌无为而羞耻。(吴运铎《把一切献给党》147) He must live so as to feel no torturing regrets for years without purpose,never know the burning shame of amean and petty past. …

• unfortunate
• unhappy
• uniform
• union
• unique
• unit
• unite
• united
• unity
• universal
• unknown
• unless
• unlike
• until
• up
• upon
• upper
• upright
• upset
• upstairs
• upward
• urge
• use
• used
• used