1. in a rough or unfinished way; without skill or care
2. in a rude or offensive manner

Examples

• The shelter was crudely built from scrap wood and metal sheets.
• He crudely sketched a map on the back of an envelope.
• The ancient tools were crudely fashioned from stone.
• She crudely interrupted the speaker with inappropriate comments.
• The joke was crudely told and offended several guests.
• The prototype was crudely assembled but demonstrated the basic concept.