prescient

showing great foresight

credulous

easily fooled

precipitate

to cause to happen suddenly and unexpectedly

mobilize

to prepare for action

appease

to make peace by giving into demands

renounce

to take back

recant

to withdraw, take back, retreat

despondent

depressed and down

detractor

a critic who puts down new ideas or inventions

deplete

to diminish by going down