1580s, of uncertain origin, probably from Middle French rouiller "to rust, make muddy," from Old French roil "mud, muck, rust" (12c.), from Vulgar Latin *robicula, from Latin robigo "rust" (see robust). An earlier borrowing of the French verb is Middle English roil "to roam or rove about" (early 14c.). Related: Roiled; roiling.
例文
1. Some of her habits are off-putting but don 't let them roil you.
彼女のいくつかの習慣は吐き気を催すが、煩わさないほうがいい。
2.Times of national turmoil generally roil a country 's financial markets.
国が不安定な時代、同国の金融市場は一般的に混乱している。
3.The machine is made from steel.It 's vibration treated roil to reduce internal stress.