undervalue
1. [ verb ] esteem lightly
Related terms: disrespect undervaluation
2. [ verb ] assign too low a value to
Synonyms: underestimate
Examples:

"Don't underestimate the value of this heirloom-you may sell it at a good price"

Related terms: overvalue overvalue value underestimate undervaluation
3. [ verb ] lose in value
Synonyms: devaluate devalue depreciate
Examples:

"The dollar depreciated again"

Related terms: appreciate decrease depreciate depreciation depreciation devaluation
Similar spelling:   underlie
  underline
  underseal
  undersurface
  understate
  undergraduate
  underframe
  understated
  undercharge
  under_wraps
  underseller
  undersealed
  undercoated
  undercover
  undersea
  underlay
  underfur
  underdevelop
  understaffed
  underdrawers
  undergird
  undergrad
  Underhill
  underivative
  underfelt
  Underdahl
  under_way
  underplay
  underpart
  underfed
  undercoat
  undersell
  underclothes
  underclothed
  undersoil
  underage
  underwear
  underling
  underlayment
  undercurrent
  underclass
  underbred
  underbelly
  underworld
  undergarment
  underived
  underlying
  undermine
  underneath
  underrate
  undershrub
  underside
  undersize
  underslung
  understand
  undertake
  undertide
  undertone
  underdone
  under_arms