c. 1200, from Old English triga, triwa "thrice" (from trie "three;" see three) + adverbial genitive -es, changed c. 1600 to -ce to reflect voiceless pronunciation.
例文
1. The metal had been valued at twice or thrice its current price.
という金属の以前の評価は現在の価格の2?3倍である。
2.They should think not twice,but thrice ,before ignoring such advice.