English Reference
verb

unleash

v.
US /ənˈɫiʃ/ UK /ʌnlˈiːʃ/ un·leash UK spelling unleashes

  1. 01 B2 Upper Intermediate

    to let a strong force or feeling happen suddenly, often with a big effect.

    to release a powerful or destructive force, emotion, or set of events that was previously controlled or suppressed.

    Simple

    The storm unleashed heavy rain and strong winds across the coast.

    In context

    The sudden change in government policy unleashed a wave of public protest that caught the administration completely off guard.

    Usage

    Always used with a direct object representing the force or emotion being released.

  2. 02 B1 Intermediate

    to take a dog or other animal off its lead so it can run free.

    to remove a leash from an animal, typically a dog, allowing it to move without physical restraint.

    Simple

    Once they reached the open field, she unleashed her dog so he could run.

    In context

    The hiker unleashed his golden retriever at the trailhead, allowing the animal to explore the undergrowth ahead of the group.

    untierelease

Hurricane Lowell, a major Category 3 storm in the Pacific Ocean, has crept closer to the Hawaiian islands with forecasters warning the weather systems could unleash tornadoes on the islands of Kauai and Niihau.

Al Jazeera· 7 Sept 2026

From un- + leash.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level B2 · Upper Intermediate
Frequency Frequent
Updated