underreckoning

Từ điển WordNet v3.1 - WordNet Dictionary

noun

an estimation that is too low;
an estimate that is less than the true or actual value
• Syn:
underestimate, underestimation, underrating
• Derivationally related forms:
underrate (for: underrating), underestimate (for: underestimation), underestimate (for: underestimate)
• Hypernyms:
estimate, estimation, approximation, idea