Uncultivated (adjective)

1. Not cultivated; not having been tilled or tended.
2. Not having been developed or improved by education, training, or care.

Origin:

Late 16th century: from un-1 + cultivated, on the pattern of words such as uneducated.

Examples:

1. The field had been left uncultivated for several years.
2. The land is covered with dense uncultivated vegetation.
3. The young boy had an uncultivated talent for music.
4. His manners were uncultivated and he had a tendency to be rude.
5. The uncultivated soil was poor in nutrients and unable to support crops.