1. comparative form of doleful; more sorrowful, mournful, or expressing sadness
Usage: comparative degree of the adjective 'doleful'; formal or literary register

Examples

• Her expression grew dolefuller as she read the letter.
• The dolefuller tone of the second movement contrasted sharply with the opening.
• His voice became dolefuller when he spoke about the loss.
• The dolefuller melody lingered in the concert hall.
• She wore a dolefuller expression than before.