influence - effect, impact, weight
disagreement - discord, contradiction, difference
piece - part, share, portion
important - measurable, significant, essential
preparation - arrangement, getting ready, broad background
particular - circumstantial, minor aspect, detail
separated - detached, divided, split up
die out - decease, fade away, let up
belongings - things, effects, possessions, stuff
pore over smth. - probe into smth., give smth. one's full concentration, peruse