Dic: acquiesce and its synonyms

acquiesce:

1. To consent or comply passively or without protest.
2. to agree to what someone wants [Latin acquiescere]

AmH-Usage Note: When acquiesce takes a preposition, it is usually used with in (acquiesced in the ruling) but sometimes with to (acquiesced to her parents' wishes). Acquiesced with is obsolete.

Collins-USAGE: The use of to after acquiesce was formerly regarded as incorrect, but is now acceptable.

Synonyms: These verbs denote acceptance of and often belief in another's views, proposals, or actions.

• Assent implies agreement, especially as a result of deliberation:
  ..... They readily assented to our suggestion.
• Agree and accede are related in the sense that assent has been reached after discussion or persuasion, but accede implies that one person or group has yielded to the other:
  ..... "It was not possible to agree to a proposal so extraordinary and unexpected" (William Robertson).
  ..... "In an evil hour this proposal was acceded to" (Mary E. Herbert).
• Acquiesce suggests passive assent because of inability or unwillingness to oppose:
  ..... I acquiesced in their decision despite my misgivings.
• Consent implies voluntary agreement:
  ..... Her parents consented to her marriage.
• Concur suggests that one has independently reached the same conclusion as another:
  ..... "I concurred with our incumbent in getting up a petition against the Reform Bill" (George Eliot).
• Subscribe indicates hearty approval:
  ..... "I am contented to subscribe to the opinion of the best-qualified judge of our time" (Sir Walter Scott).

... The American Heritage, http://www.thefreedictionary.com/assent