a rope or wire that is stretched tightly high above the ground and that performers walk along, especially in a circus （尤指马戏团表演用的）绷紧的绳索，绷紧的钢丝 a tightrope walker 走钢丝演员
Oxford Collocations DictionaryTightrope is used before these nouns:- walk
Idioms
tread/walk a tightrope
to be in a difficult situation in which you do not have much freedom of action and need to be extremely careful about what you do 身处困境；如履薄冰 The government is walking a difficult tightrope in wanting to reduce interest rates without pushing up inflation. 政府想在不推高通胀的情况下降低利率，这是在走一条艰难的钢丝。