To reach your tether

[lan]

Test No. incompl/inter-97 "Letter of Complaint (4)", question 8

Since returning in September I have made at least a dozen phone calls and quite frankly I have reached the end of my .........

(a) tether
(b) line
(c) rope
(d) cord

Test No. incompl/inter-97 "Letter of Complaint (4)", answer 8

Since returning in September I have made at least a dozen phone calls and quite frankly I have reached the end of my tether

Correct answer: (a) tether

Your answer was: incorrect
Since returning in September I have made at least a dozen phone calls and quite frankly I have reached the end of my rope
_________________________

what is the meaning of tether?

[Torsten]

If you have reached your tether, you have reached the limit of your abilities or endurance, that means, you can't go any futher.

TOEIC listening, photographs: Inline skating