according to letter (adverb) word for word: using exactly the same words
Sinonime: accept,
acquiesce,
admit, allow,
assent, be game for, cave in, comply,
concede, concur,
cooperate, cry uncle,
endorse, enter into,
fold, give the go-ahead, give the green light, go along with,
grant,
let, okay,
permit, play ball, roll over and play dead, subscribe, throw in the towel, yield
Antonime: condemn,
demur,
denounce, denounce,
deny, protest,
refuse