1610s, from above and board (n.1). "A figurative expression borrowed from gamesters, who, when they put their hands under the table, are changing their cards." [Johnson]
雙語例句
1. I didn't have to bribe anyone; it was all open and aboveboard.
我沒有必要賄賂任何人, 這完全是光明正大的.
來自《簡明英漢詞典》
2. His part in the affair was quite open and aboveboard.
他參與這件事完全是正大光明的.
來自《簡明英漢詞典》
3. He had been open and aboveboard, and there was nothing to fear.