vow /ˈvaʊ/
  誓約,誓言,許愿(vi.)起誓,發誓,承認(vt.)立誓,起誓要,公開宣布
  Vow v. t. [imp. & p. p. Vowed p. pr. & vb. n. Vowing.]
  1. To give, consecrate, or dedicate to God, or to some deity, by a solemn promise; to devote; to promise solemnly.  “When thou vowest a vow unto God, defer not to pay it.”
     [Men] that vow a long and weary pilgrimage.   --Shak.
  2. To assert solemnly; to asseverate.
  Vow n.
  1. A solemn promise made to God, or to some deity; an act by which one consecrates or devotes himself, absolutely or conditionally, wholly or in part, for a longer or shorter time, to some act, service, or condition; a devotion of one's possessions; as, a baptismal vow; a vow of poverty.  “Nothing . . . that may . . . stain my vow of Nazarite.”
     I pray thee, let me go and pay my vow.   --2 Sam. xv. 7.
     I am combined by a sacred vow.   --Shak.
  2. Specifically, a promise of fidelity; a pledge of love or affection; as, the marriage vow.
  Knights of love, who never broke their vow;
  Firm to their plighted faith.   --Dryden.
  Vow, v. i. To make a vow, or solemn promise.
     Better is it that thou shouldest not vow, than that thou shouldest vow and not pay.   --Eccl. v. 5.
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  vow
       n : a solemn pledge (to oneself or to another or to a deity) to
           do something or to behave in a certain manner; "they took
           vows of poverty"
       v 1: make a vow; promise; "He vowed never to drink alcohol again"
       2: dedicate to a deity by a vow [syn: consecrate]