動詞 under-develop:

1. process (a film or photographic plate) less than the required time or in an ineffective solution or at an insufficiently high temperature
   同義詞：underdevelop

形容詞 under-developed:

1. relating to societies in which capital needed to industrialize is in short supply
   同義詞：developing, underdeveloped
2. not yet fully developed
   同義詞：underdeveloped
3. (of a photograph) lacking in contrast because it was left in the developer for less than the required time
   同義詞：underdeveloped