名詞 clincher:

1. an argument that is conclusive
   同義詞：determiner, determining factor
2. a point or fact or remark that settles something conclusively
   同義詞：decisive factor
3. a tool used to clinch nails or bolts or rivets

clinch.er

n.（名詞）
One that clinches, as:
固定用的物品，如：
A nail, screw, or bolt for clinching.
鉚釘：用于固定的釘子、螺絲或螺絲釘
A tool for clinching nails, screws, or bolts.
緊鉗：固定釘子、螺絲或螺絲釘?shù)墓ぞ?/br>Informal A point, fact, or remark that settles something conclusively; a decisive factor.
【非正式用語】 關(guān)鍵話，定論：對徹底解決某事的重點、事實或評論；決定性因素