1. removes an obstruction from something; clears a blockage
Usage: third person singular present tense of ‘unblock’
2. removes restrictions or barriers that prevent access or communication
Usage: computing; telecommunications

Examples

• The plumber unblocks the drain with a special tool.
• She unblocks the website by changing her browser settings.
• The medication unblocks the patient’s airways.
• He unblocks his friend on social media after their argument.
• The technician unblocks the phone number from the system.
• Hot water unblocks the clogged pipe effectively.