Footer

    Download on the App StoreGet it on Google Play

    About

    • About Us
    • Our Learning Services
    • Join Us
    • FAQ
    • Hot Tags

    Services

    • Pronunciation Challenge
    • Saved
    • Search Vocabulary
    • Blog

    Channels

    Levels

    • A1
    • A2
    • B1
    • B2
    • C1
    • C2

    Privacy˙Terms˙
    ©2026 VoiceTube Corporation. All rights reserved

    key to

    US /ki tu/

    ・

    UK /ki: tu:/

    A1
    n.NounSomething that provides a solution or explanation.
    Hard work is the key to success.
    n.NounAn object used to open a lock.
    This is the key to the front door.
    n.NounEssential for understanding or achieving something.
    Understanding the data is key to solving the problem.
    n.NounA list of answers or explanations.
    The teacher provided a key to the exercises.

    Video subtitles

    How Words Can Harm: Crash Course Philosophy #28

    10:46How Words Can Harm: Crash Course Philosophy #28
    • These groups are generally based on something that's key to a person's identity, like race, ethnicity, gender, sexual orientation, or religion.

      These groups are generally based on something that's key to a person's identity, like race, ethnicity, gender, sexual orientation, or religion.

    • These groups are generally based on something that's key to a person's identity – like race, ethnicity, gender, sexual orientation, or religion.

      These groups are generally based on something that's key to a person's identity – like race, ethnicity, gender, sexual orientation, or religion.

    B1

    Bereavement: How to Transform Grief & Depression Through Spiritual Healing

    35:17Bereavement: How to Transform Grief & Depression Through Spiritual Healing
    • First of all, the realization that love is real and nothing else exists, that love is all that matters, that if that forgiveness is the key to happiness,

      First of all, the realization that love is real and nothing else exists, that love is all that matters, that if that forgiveness is the key to happiness,

    • That if… that forgiveness is the key to happiness and if you don't forgive… love

      That if… that forgiveness is the key to happiness and if you don't forgive… love

    B1

    How to Get People to Listen to You | The Harvard Business Review Guide

    10:12How to Get People to Listen to You | The Harvard Business Review Guide
    • What would that look like?" Author Ben Parr reminds us that repetition is also key to capturing people's attention.

      What would that look like?" Author Ben Parr reminds us that repetition is also key to capturing people's attention.

    • key to capturing people's attention.

      key to capturing people's attention.

    A2

    How Europe Lost Its Tech Giants

    09:10How Europe Lost Its Tech Giants
    • Innovation is key to staying ahead,

      Innovation is key to staying ahead,

    • Innovation is key to staying ahead,  and learning how to innovate starts

      Innovation is key to staying ahead,  and learning how to innovate starts

    B1

    How Singapore Got So Crazy Rich

    07:01How Singapore Got So Crazy Rich
    • That's been key to Singapore's success.

      That's been key to Singapore's success.

    • That's been key to Singapore success.

      That's been key to Singapore success.

    B1

    How to Get Good at Small Talk, and Even Enjoy It

    10:25How to Get Good at Small Talk, and Even Enjoy It
    • We're talking about being spontaneous, and here I am saying structure is the key to spontaneity.

      We're talking about being spontaneous, and here I am saying structure is the key to spontaneity.

    • and here I am saying structure is the key to spontaneity.

      and here I am saying structure is the key to spontaneity.

    A2

    iPhone Thief Explains How He Breaks Into Your Phone | WSJ

    09:47iPhone Thief Explains How He Breaks Into Your Phone | WSJ
    • Now when you got your face on there, you got the key to everything. Things that people thought were safe.

      Now when you got your face on there, you got the key to everything. Things that people thought were safe.

    • you got the key to everything,

      you got the key to everything,

    A2

    Evolution Can't Explain Your Grandma

    09:31Evolution Can't Explain Your Grandma
    • But for killer whales and humans alike, grandmothering is described as the key to survival, and sets us apart from other species who don't have these matrilineal practices, and are fertile their whole lives.

      But for killer whales and humans alike, grandmothering is described as the key to survival, and sets us apart from other species who don't have these matrilineal practices, and are fertile their whole lives.

    • as the key to survival, and sets us apart from other species who

      as the key to survival, and sets us apart from other species who

    B2

    How to Work with Someone You Can't Stand: The Harvard Business Review Guide

    08:20How to Work with Someone You Can't Stand: The Harvard Business Review Guide
    • Diverse opinions and work styles can be key to innovation and problem-solving.

      Diverse opinions and work styles can be key to innovation and problem-solving.

    • be key to innovation and problem-solving.

      be key to innovation and problem-solving.

    B1

    Elon Musk makes surprise visit to China: Here's what to know

    04:13Elon Musk makes surprise visit to China: Here's what to know
    • Musk's China VP said on social media that the two discussed AI as well as autonomous driving as key to the future for EVs.

      Musk's China VP said on social media that the two discussed AI as well as autonomous driving as key to the future for EVs.

    • AS AUTONOMOUS DRIVING AS KEY TO

      AS AUTONOMOUS DRIVING AS KEY TO

    B1