A tightrope can be pictured as a line pulled so tight that it does not move, strung high in the air. It is thinner than a foot. Once you are on it there is no left and no right, only forward, one careful step at a time, with a drop on both sides.
可以想成一條被拉到動也不動的細繩，架在很高的空中。它比腳掌還窄。站上去以後沒有左右可以挪，只剩下往前，一步一步慢慢走，而兩邊都是空的。
From the word’s history
The word is simply tight plus rope, so the tightness that makes the whole picture work is written into the name itself.
這個字就是 tight（緊）加 rope（繩），讓整個畫面成立的那個「緊」，直接寫在名字裡。
Wiktionary entry supplied in this packet (kaikki:3f6f69a190036ae4:1128855556): From tight + rope.
登入就可以看每一支怎麼連回核心畫面。