adjective. Not fully developed.

adjective. Processed in too weak a developing solution, or for too short a time, or at too low a temperature to produce a normal degree of contrast. Used of film.

adjective. Having a low level of economic productivity and technological sophistication within the contemporary range of possibility; developing.

adjective. immature and not fully developed

adjective. having a low level of economic productivity and technological sophistication

adjective. of a film that has had insufficient development before being fixed

verb. Simple past tense and past participle of underdevelop.

adjective. not yet fully developed

adjective. relating to societies in which capital needed to industrialize is in short supply

"Van Praagh says there are people who claim to be mediums who have what he calls underdeveloped abilities."

immature  nonindustrial  

developed  enveloped  undeveloped  

dude/some  glitchy  hands  high-maintenance  inept  

arrested  backward  behindhand  callow  coarse  

underdevelop