呼 hu1 呼
之 zhi1 之
欲 yu4 欲
出 chu1 出
  1. lit. ready to appear at the call (idiom)
  2. fig. on the verge of coming out into the open
  3. (of a person's choice etc) on the point of being disclosed
  4. (of an artistic depiction) vividly portrayed

Examples

话到舌尖，呼之欲出

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