刀を鍛えるを英語でなんと言うか？

まず、鍛えるとは形成すると言う意味。forge という単語を使う。人間関係を築くと言うときにも forge は使える。0:11 the metal working method that produces the strongest steel parts is forging. 強い鋼（はがね）を作る方法は鍛錬（たんれん）と言う。

https://www.youtube.com/watch?v=7708E1bmoxc  5;20 sharpening blades of their hand-forged planes and chisels. 自家製のかんなとのみを研ぐところから始まる
https://www.youtube.com/watch?v=GkUQ-MnT93s  1;09 as I look around this hall tonight, and even take a peek at the person sitting three from my left, I thank God for those friendships, our friendship forged in our ancient halls. 古いホールで結ばれた友情
https://www.youtube.com/watch?v=qZjwIVzcbjk  8:15 since the hunt began Dial has forged a close relationship with Forrest Fenn. ダイアルさんはフェンさんと友好関係を結んだ。
https://www.youtube.com/watch?v=ChG57EKJnPA  2:23 he has forged a relationship with them.

https://www.youtube.com/watch?v=1gl95A6nb6w  9:07 a traditional Japanese sword forging demonstration 　鍛錬、鍛造
Japanese Knife & Sword City: Seki Experience ★ ONLY in JAPAN

参考リンク
http://bridge-english.blogspot.jp/2013/09/blog-post_26.html  人格を形成するを英語でなんと言うか？

練習問題解答
a-1474 forged
a-1631 forged in fire
a-4803 friendships forged
a-6002 forging a formidable alliance