資料來源 : pyDict

向後;落後;怕羞

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Backwardness \Back"ward*ness\, n.
   The state of being backward.

資料來源 : WordNet®

backwardness
     n : lack of normal development of intellectual capacities [syn:
         {retardation}, {mental retardation}, {slowness}, {subnormality}]