Old English foresteall ‘an ambush’ (see fore- and stall). As a verb the earliest sense (Middle English) was ‘intercept and buy up goods before they reach the market, so as to raise the price’ (formerly an offence)
古英語のforesteall「待ち伏せ」(fore-とstallを参照)。動詞としての最古の意味(中英語)は「市場に出る前に商品を横取りして買い占め、価格をつり上げる」(かつては犯罪)。