- undeveloped - not developed; "courses in interior design were rare and undeveloped"; "undeveloped social awareness"
Antonyms: developed, formed, mature, matured, formulated
- unexploited, undeveloped - undeveloped or unused; "vast unexploited (or undeveloped) natural resources"
- undeveloped - (of real estate) not built upon or ready for building upon; "taxes on undeveloped lots are low"
Antonym: improved (indirect, via unimproved)