名詞 fastening:

1. restraint that attaches to something or holds something in place
   同義詞：fastener, holdfast, fixing
2. the act of fastening things together
   同義詞：attachment

動詞 fasten:

1. cause to be firmly attached
   同義詞：fasten, fix, secure
2. become fixed or fastened
   同義詞：fasten
3. attach to
   同義詞：fasten
4. make tight or tighter
   同義詞：tighten, fasten

1. A fastening device consisting of parallel rows of metal, plastic, or nylon teeth on adjacent edges of an opening that are interlocked by a sliding tab.
   拉鏈由平行的金屬、塑料或尼龍的齒狀物制成的，在開口臨近邊緣上被滑動的拉環(huán)鎖住的緊扣物
2. An ornamental looped braid or cord with a button or knot for fastening the front of a garment.
   (紡錠物)飾扣一種用來系住衣服前襟的裝飾性扣環(huán)或扣結
3. A fastening, as for a door or gate, typically consisting of a bar that fits into a notch or slot and is lifted from either side by a lever or string.
   門閂閂，例如門閂，尤指帶有一橫銷，插在槽或狹縫中通過把手或鐵鏈從一頭提到另一頭
4. It's silly to drive without fastening one's seat belt.
   不系保險帶開車就太傻了。

fas.ten.ing

n.（名詞）
Something, such as a hook, used to attach one thing to another firmly.
緊固件：能使一件東西牢牢固定在另一件東西的物件，如鉤子