English Reference

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.

“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.

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.

“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).

Synonyms

Collocations

Common phrases and expressions where native English speakers use the word “understand” in context.

01. generally understand 02. readily understand 03. understand concept 04. understand consequence 05. understand gain 06. understand impact 07. understand implication 08. understand importance 09. understand meaning 10. understand phenomenon 11. understand process 12. understand relationship

Confusables

understand vs realize

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

understand(A1)

Idioms

Grammar

Domain

Grammar

This entry

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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