Words to Describe underestimation

How underestimation often is described ("________ underestimation")

• dramatic
• progressive
• fold
• vast
• substantial
• obvious
• naive
• average
• official
• clear
• apparent
• consistent
• chronic
• potential
• systematic
• persistent
• massive
• deliberate
• continual
• observed
• subjective
• serious
• general
• gross
• grave
• relative
• corresponding
• initial
• usual
• constant
• disastrous
• mutual
• habitual
• probable
• overall
• erroneous
• considerable
• frequent
• intended
• perceptual
• dangerous
• slight
• side
• consequent
• histologic
• marked
• fatal
• widespread
• possible
• likely
• profound
• over
• concomitant
• tragic
• complete
• drastic
• significant
• severe
• subsequent
• resultant
• perilous
• radical
• earlier
• previous