blush
I
 /ˈblʌʃ/  verb  , blush·es, blushed, blush·ing [  no obj  ]
  1 : to become red in your face because you are ashamed, embarrassed, confused, etc.
   He blushed at the compliment.
   The unexpected attention made her blush (with embarrassment).
  2 : to be embarrassed
   I blush to admit it, but you've caught me in an error.
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II
  noun  ,  pl   blushes
  1 [  count  ] : the red color that spreads over your face when you are ashamed, embarrassed, confused, etc.
   The comment brought a blush to her cheeks.
  2 [  count  ] : a slight red or pink color
   The fruit is yellow, with a blush of pink.
  3 [  noncount  ] US : a cream or powder that some people put on their cheeks to make their cheeks pink or reddish
   She put on a little lipstick and blush.
  — called also (chiefly Brit) blush·er /ˈblʌʃɚ/
  at first blush — see first, 1
  spare someone's blushes — see spare, 2