thief: [OE] Thief goes back to a prehistoric Germanic *theubaz, which also produced German dieb, Dutch dief, Swedish tjuf, and Danish tyv. It is not clear where this came from, although it might be related to Lithuanian tupeti ‘cower, squat’ and Latvian tupt ‘squat’, in which case it would denote etymologically ‘crouching, furtive person’. From *theubaz was derived *thiūbithō, ancestor of modern English theft. => theft
thief (n.)
Old English teof "thief, robber," from Proto-Germanic *theubaz (cognates: Old Frisian thiaf, Old Saxon thiof, Middle Dutch and Dutch dief, Old High German diob, German dieb, Old Norse tiofr, Gothic tiufs), of uncertain origin.
例文
1. Ness chased the thief down and held him until police arrived.
ネスは泥棒に追いつき、押さえて、警察が到着するまで待っていた。
2.You are protected instantly if a thief misuses your credit card.
クレジットカードを盗むと、カードはすぐに保護されます。/
3.The thief had broken in through a first-floor window.