c. 1200, from Old English þriga, þriwa "thrice" (from þrie "three;" see three) + adverbial genitive -es, changed c. 1600 to -ce to reflect voiceless pronunciation.
实用例句
1. The metal had been valued at twice or thrice its current price.
这种金属以前的估价是目前价格的两到三倍。来自柯林斯例句
2. They should think not twice, but thrice, before ignoring such advice.