Word
understand
Phoneticsun·der·stand, stress on the third syllable
US/ˌəndɝˈstænd/
UK/ˌʌndəstˈænd/
Irregular verb
Forms
Infinitive
understand
Past
understood
Past participle
understood
Definitions
01to comprehend meaning
A1 · Beginner
v. to know the meaning of what someone is saying or writing.
v. to grasp the intended meaning of a communication or the significance of a concept.
日本語:わかる※
“I didn't understand the instructions, so I asked the teacher for help.”
“Even after reading the technical manual twice, the engineers struggled to understand the logic behind the new software architecture.”
Usage
Usually used in simple tenses rather than continuous forms.
Pitfall
I am understanding the lesson now.
I understand the lesson now.
Understand is a stative verb; it is rarely used in the continuous (-ing) form to describe a state of knowledge.
Synonyms
Antonyms
02to know a person's motives
B1 · Intermediate
v. to know why someone behaves the way they do or how they feel.
v. to perceive the nature, character, or motives of a person or the underlying causes of an event.
日本語:わかる※
“She is a very private person, so it takes time to really understand her.”
“The biographer spent years researching the subject's early life to understand the trauma that shaped his later political decisions.”
03to believe or infer
B2 · Upper Intermediate Formal
v. to believe something is true because of information you have received.
v. to infer or assume a fact based on information received, often used to introduce a request for confirmation.
“I understand that you are looking for a new job.”
“We understand that the shipment has been delayed due to weather conditions, but we require a firm delivery date.”
Usage
Often followed by a 'that' clause.
04implied in grammar
C1 · Advanced Science Technical
v. to treat a word as if it is there, even if it is not written or spoken.
v. to supply a word or phrase mentally in a construction where it is omitted by ellipsis.
“In the sentence 'Go home', the subject 'you' is understood.”
“In many imperative constructions, the second-person pronoun is understood rather than explicitly stated, yet it governs the reflexive pronoun choice.”
Usage
Usually used in the passive voice in linguistic contexts.
Synonyms
05acknowledging a point
B2 · Upper Intermediate Dialect
interj. a way to say you have heard and accepted what someone said.
interj. a discourse marker used to acknowledge receipt of information or to signal agreement.
“The meeting is at five? Understand.”
“The client wants the revisions by tomorrow morning? Understand, I will tell the team immediately.”
Teaching tip
This specific usage as a standalone interjection is particularly common in Singaporean and Malaysian English (Manglish/Singlish).
Collocations
Common phrases and expressions where native English speakers use the word “understand” in context.
Confusables
Understand is the ongoing state of knowing how something works; realize is the sudden moment of becoming aware of a fact.
RememberUnderstand is a state; realize is a spark.
Etymology
From Middle English understanden, from Old English understandan (“to understand”), from Proto-West Germanic understandan (“to stand between, understand”), from Proto-Germanic understandaną (“to stand between, understand”), equivalent to Old English under- (“between, inter-”) + standan (“to stand”) (Modern English under- + stand). Cognate with Old Frisian understonda (“to understand, experience, learn”), Old High German understantan (“to understand”), Middle Danish understande (“to understand”). Compare also Saterland Frisian understunda, unnerstounde (“to dare, survey, measure”), Dutch onderstaan (“to undertake, presume”), German unterstehen (“to be subordinate”).
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Word family
VERB
NOUN
ADJECTIVE
Idioms
Grammar
Domain
- Exam level
- CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.A1 MoversIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.2.0–3.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 1.0–1.50–23TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.120–224
- Frequency
- Very common
- Level
- A1 · BeginnerOxford
- Updated
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QR code
englishreference.com/q/understand
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「日本語」 data: JMdict (EDRDG), CC BY-SA 4.0