the phrase "bound to"
Gutkowski said people were bound to be disappointed, even where governments were overthrown.
what is "bound to"?

Question

Answer

"Bound" should be interpreted as "certain".

It is an idiom or figure of speech coming from the literal meaning of "bound" as in "tied up," so the people have no choice but to be disappointed, because they are tied to it.

Answer

is bound to happen = is highly likely going to happen

You know, if you have problems with single words like these, a dictionary does a great job.