I chose highlighted, underscored here, being synonyms, i.e. to place emphasis. Did not find any other pairs.
Specifically, the correct pair as per answer key I did not choose because- when we say “weakened” actual rigidity, it actually means Wilson was not as rigid- which is going against the idea of the sentence that he is actually rigid.
Do let me know please where my logic is wrong here- unable to understand this one. Thanks!
So the idea here is that he initially says he will negotiate, then refuse to compromise. So his “position” changes and it cannot be trusted, it is NOT rigid.
However, now that you point it out, highlighted and underscored also works here, since its showing that the rigidity is bad.