1 B1 neutral
To jump or fall suddenly into water or another liquid
"Without hesitating, he plunged in and swam toward the struggling child."
plunge in
B2 informal intransitive
To begin something boldly and without hesitation, or to enter water or a substance suddenly
In plain English
To jump straight into something — water or an activity — without stopping to think
What does "plunge in" mean?
2 meanings, ordered from most common to least. Color-coded by CEFR level.
2 B2 idiomatic informal
To start doing something boldly and without hesitation or full preparation
"Instead of overthinking it, she just plunged in and started writing the first chapter."
Literal vs figurative
Words literally mean
To jump into water or a liquid
Actually means
To jump straight into something — water or an activity — without stopping to think
Usage tip
When used figuratively, it typically implies starting something with commitment before fully preparing, which can be admirable or reckless depending on context. Often used as encouragement: 'Just plunge in and do it!'
Words that pair with "plunge in"
Natural word combinations native speakers use most often.
start begin task project conversation water cold
How to conjugate "plunge in"
The five tense forms you'll use most often.
Base
plunge in
I/you/we/they
3rd person
plunges in
he/she/it
Past simple
plunged in
yesterday
Past participle
plunged in
have + pp
-ing form
plunging in
continuous
Hear "plunge in" in the wild
Listen to native speakers using "plunge in" in real YouTube videos — click a clip to watch it on Looplines.
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