1. to penetrate or pass through each other; to permeate mutually
Usage: third-person singular present tense of 'interpenetrate'
2. to blend or merge so that the boundaries between things become unclear
Usage: often used in abstract or philosophical contexts

Examples

• The roots of the two plants interpenetrate beneath the soil.
• Light interpenetrates the crystal, creating a beautiful glow.
• In this novel, the themes of love and loss interpenetrate throughout the narrative.
• The two cultures interpenetrate, creating a unique hybrid society.
• Water interpenetrates the porous stone over time.
• Their conversations interpenetrate with shared memories and inside jokes.