1. not given help, encouragement, or assistance
2. not held up or kept in position by something
3. not backed up by evidence or proof

Examples

• The elderly woman felt unsupported after her family moved away.
• The unsupported beam collapsed under the weight.
• His unsupported claims were rejected by the committee.
• She made the difficult decision unsupported by her colleagues.
• The roof section was left unsupported during construction.
• The theory remains unsupported by scientific evidence.
• The unsupported wall began to lean dangerously.