underscore
1. [ verb ] give extra weight to (a communication)
Synonyms: underline emphasize emphasise
Examples:

"Her gesture emphasized her words"

Related terms: stress emphasizing
2. [ verb ] draw a line or lines underneath to call attention to
Synonyms: underline
Related terms: mark
3. [ noun ] a line drawn underneath (especially under written matter)
Synonyms: underline
Related terms: stroke underline
Similar spelling:   undersea
  underside
  undersize
  undertone
  underperform
  underbred
  underseal
  underdone
  undersell
  undercurrent
  undersexed
  undersized
  undercover
  underspend
  underspent
  underdress
  underquote
  under_arms
  under_fire
  understate
  undergo
  understated
  underseller
  undercoated
  underexpose
  under_wraps
  undersealed
  underfur
  underdog
  undertow
  understaffed
  underclothes
  underclothed
  underdressed
  underbodice
  undernourish
  unaddressed
  undercoat
  underboss
  underbody
  undereducated
  underage
  underemployed
  underestimate
  underexposure
  underfed
  underfoot
  Underdown
  underpass
  undergird
  Underwood
  underwear
  undersurface
  undersoil
  undershot
  underproduce
  undersign
  underlie
  undergrow
  underpart
  undermine
  underrate
  undershirt
  undershoot
  underline
  undershrub
  undergarment
  underskirt
  underslung
  understand
  understock
  understood
  understudy
  underived
  undertake
  undertide
  underfelt
  underworld