n.(拴牲畜用的)系绳;限度,极限;
vt.用绳拴住;拘束,束缚;
例句:
I'm at the end of my tether.
我已经走投无路.
It'seems that i am at the end of my tether.
看起来我已经无路可走了.
I was now at the end of my tether.
这时我已智穷力竭.