UNDERESTIMATED
Scrabble letter values: U1N1D2E1R1E1S1T1I1M3A1T1E1D2 = 18
Definition
UNDERESTIMATED is the past tense of UNDERESTIMATE.
noun UNDERESTIMATE: an estimation that is too low.
Synonyms of UNDERESTIMATE: underestimation, underrating, underreckoning