The overwhelming feeling is just deep, profound shock and anger.
What does the whole sentence mean?
Overwhelm = strong to the point of dominating other things
deep (here) = of significant impact, effect
profound = not trivial, not slight, affecting significantly, probably relating strongly to you, meaningful (to you)
shock = surprise, but a strong form of surprise, an afront
anger = maybe you know
The last two describe what sort of response. It could have been happy, sad, mildly amusing. Instead it was shock and anger.
The overwhelming feeling is just deep, profound shock and anger.
The effect on (you) is a powerful, unsteadying, emotional response which manifests itself as a meaningful, far-reaching , shock and anger.
What does "A significant role, point or figure in something is one that is important" mean?
in --> is?
It seems to define "significant"
A role which is "significant" is one which is ....is an important one (role)
A point which is "significant" is one which is ....is an important one (point)
A figure which is "significant" is one which is ....is an important one (figure)
What does "A pivotal role, point or figure in something is one that is very important and affects the success of that thing." mean?
It seems to define "pivotal"
A role which is "pivotal" is a role which .....is very important and affects the success of that thing.
That thing is not defined. Whatever the role relates to.,
ٌwhat does "Seeing the poverty in that part of the world was a very priceless experience - it made me sad and thoughtful" mean?
word --> world?
The writer saw poverty in a place.
They consider the experience of seeing it as priceless - probably invaluable.
The effect it had on them was to made them feel sad and thoughtful. It saddened them and made them think about ... stuff/things
Hope this helps.