The word is stymies. It means prevent or hinder the progress.
dons
A seven letter word for shut off, shut out, prevent passage is occlude.
enacts
the answer is puts
mislays
If by places down one means to put something down then the four letter words are simple. They would be sets, puts or pose.
opine
icer
I've is a word that means I have. I'll is a word that means I will.
A ten letter word that means equal to is equivalent.
Brave is a five-letter word that means gallant.
The four letter word that means, "I forbid," is veto.veto