fasten: [OE] Etymologically, fasten means ‘make fast’; it goes back ultimately to Germanic *fastuz, source of English fast. From this was derived a verb *fastinōjan, which passed into Old English as fæstnian. To begin with this seems only to have been used in the metaphorical sense ‘settle, establish’. The more concrete ‘attach’ is not recorded until the 12th century, and the earliest reference to its use for locking or bolting a door comes from as late as the mid-18th century. => fast
fasten (v.)
Old English fæstnian "make fast, make firm, fix, secure," also "ratify, betroth, confirm," from Proto-Germanic *fastinon "to make firm or fast" (cognates: Old Frisian festnia "to make firm, bind fast," Old Saxon fastnon, Old High German fastnion, German festnen, Old Norse fastna "to pledge, betroth"), from PIE *fast "solid, firm" (see fast (adj.)). Related: Fastened; fastening.
权威例句
1. Builders must fasten down roofs of newly-built homes more securely.
建造工人必须把新建房屋的屋顶固定得更牢靠些。
2. They fasten with a drawstring.
它们是用拉绳系紧的。
3. Fasten your seatbelts, please.
请系好安全带。
4. Fasten your seat belts.
系好安全带。
5. When you sew up to this end, fasten off the thread.