1) Allow too much for 2) Construe wrongly 3) Estimate incorrectly 4) Estimate wrongly 5) Get it wrong 6) Judge incorrectly 7) Miscalculate 8) Misconstrue 9) Mistake 10) Misunderstand 11) Overestimate 12) Overrate 13) Overvalue 14) Slip 15) Think wrongly of 16) Underestimate 17) Underrate 18) Undervalue 1) Err 2) Miscalculate 3) Misconstrue 4) Misestimate 5) Misinterpret 6) Overrate 7) Underrate 8) Undervalue 
• (v. t. & i.) To judge erroneously or unjustly; to err in judgment; to misconstrue.
Mis·judge' transitive verb & i. To judge erroneously or unjustly; to err in judgment; to misconstrue. 
[v] - judge incorrectly