The phrase "stiff resistance" means strong and determined opposition or refusal to give in to something.
Sentences with «stiff resistance»
That proposal met stiff resistance from upstate lawmakers who represent districts near the Canadian border and from Canadian officials themselves who feared that it would harm cross-border economic traffic. (nydailynews.com)
It seems there is no stopping Bitcoin to reach $ 5000 mark from here, where it may face stiff resistance since it's a major psychological barrier. (bitcoinprice.com)
But so far, they've met with stiff resistance from the teachers unions, which have a vested interest in the current system. (nypost.com)