gleam vs warning sign

gleam

noun
  • An indistinct sign of something; a glimpse or hint. 

  • A bright, but intermittent or short-lived, appearance of something. 

  • An appearance of light, especially one which is indistinct or small, or short-lived. 

  • A look of joy or liveliness on one's face. 

verb
  • Chiefly in conjunction with an adverb: to cause (light) to shine. 

  • To shine, especially in an indistinct or intermittent manner; to glisten, to glitter. 

  • To be strongly but briefly apparent. 

warning sign

noun
  • An indication that someone or something is in danger or at risk 

  • A sign that indicates a danger, for example to vehicles on a road or of hazardous chemicals. 

How often have the words gleam and warning sign occurred in a corpus of books? (source: Google Ngram Viewer )