1. to become deeper or make something deeper
Usage: third person singular present tense of ‘deepen’
2. to become more intense, serious, or profound
Usage: often used with emotions, relationships, or understanding

Examples

• The river deepens as it flows toward the ocean.
• Her voice deepens when she’s angry.
• The mystery deepens with each new clue.
• Their friendship deepens over time.
• The economic crisis deepens every month.
• His understanding of the subject deepens through practice.
• The color deepens from light blue to navy.