take one up on

acknowledge admit adopt affirm approve assume buy comply recognize sign undertake

accede acquiesce assent avow bear okay

agree to check out concur with cooperate with give stamp of approval give the go-ahead give the green light give the nod go for lap up rubber-stamp set store by sign off on take on thumbs-up

deny disapprove oppose refuse reject repudiate

condemn disagree dissent protest

blackball decline demur disallow discard dispute renounce

acknowledge admit allow comply concede concur grant recognize set settle sign

accede acquiesce check consent engage okay permit subscribe

be of the same mind bury the hatchet buy into clinch the deal come to terms cut a deal give blessing give carte blanche give green light give the go-ahead go along with make a deal pass on play ball see eye to eye shake on side with yes

contradict deny disagree disapprove dispute dissent oppose refuse reject repudiate resist

object protest

contend decline differ

accept a challenge issue a challenge to take a dare