1. (

• underestimate ,
• underestimation ,
• underrating ,
• underreckoning

) an estimation that is too low; an estimate that is less than the true or actual value ;

1. (

• underestimate ,
• underrate

) make too low an estimate of; "he underestimated the work that went into the renovation"; "Don't underestimate the danger of such a raft trip on this river" ;