UNDERESTIMATING
Scrabble letter values: U1N1D2E1R1E1S1T1I1M3A1T1I1N1G2 = 19
Definition
UNDERESTIMATING is the present participle of UNDERESTIMATE.
noun UNDERESTIMATE: an estimation that is too low.
Synonyms of UNDERESTIMATE: underestimation, underrating, underreckoning