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📕 rednote ID(小红书号)：3881567312

Underlie: Definition, Examples, and Usage Guide (2 meaning)

Meaning 1：form the basis of (underlie)

underlie 🔊

/ˌʌndərˈlaɪ/

vt.

to be the basic support or foundation for something; to be the real reason something exists or works.

Underlie foundation diagram building cross-section

form the basis of 🔊

➕

/fɔːrm ðə ˈbeɪsɪs ʌv/

vt.

To serve as the fundamental support or hidden cause that makes something possible or functional.

📁 Category：Technological Inventions 🔖 Level：Advanced

📘 Details & Usage

📖 Root Explanation

From Old English underlicgan, combining under- (below) and licgan (to lie, be situated).

💡 Mnemonic

Think of a building's foundation: it 'under-lies' everything above. Under the building lies the support.

📖 Example

Advanced chip technology is what underlies the success of modern smartphones, enabling them to be fast and powerful. 🔊 Advanced chip technology is what forms the basis of the success of modern smartphones, enabling them to be fast and powerful.

🔗 Collocations

principles that underlie – the fundamental rules that serve as a basis

assumptions underlying – the assumed ideas that form the foundation

factors underlying – the hidden causes that support something

🔄 Synonyms

support (vt.) – To hold up or provide a base for something.

undergird (vt.) – To strengthen or secure from beneath; to provide a strong foundation.

found (vt.) – To establish or set up on a stable base.

🚫 Antonyms

undermine (vt.) – To weaken or destroy the foundation or support of something.

overlie (vt.) – To lie on top of, rather than provide a base.

🌱 Derivatives

underlying (adj.) – Serving as a foundation or basic cause.

underlier (n.) – Something that serves as a support or basis.

📖 Cultural Story

The word 'underlie' has been used since Old English to describe physical support. In modern English, it is frequently employed in academic and scientific contexts to denote the fundamental principles or hidden causes of phenomena.

Meaning 2：be the hidden reason for (underlie)

underlie 🔊

/ˌʌndərˈlaɪ/

vt.

to be the real but less obvious reason for something that happens or how someone behaves.

Underlie hidden reason iceberg infographic

be the hidden reason for 🔊

➕

/biː ðə ˈhɪdən ˈriːzən fɔːr/

vt.

To be the real but not immediately obvious cause or motive behind an action, trend, or event.

📁 Category：Behaviors & Actions 🔖 Level：Advanced

📘 Details & Usage

📖 Example

A desire for comfort and self-expression underlies the recent trend for oversized clothing among young people. 🔊 A desire for comfort and self-expression is the hidden reason for the recent trend for oversized clothing among young people.

🔗 Collocations

motives that underlie – the hidden intentions that explain actions

fears underlying – the concealed anxieties that cause behavior

beliefs underlying – the foundational convictions that shape decisions

🔄 Synonyms

motivate (vt.) – To provide a reason or incentive for an action.

prompt (vt.) – To cause or incite someone to do something.

ground (vt.) – To base something on a particular reason or principle.

🚫 Antonyms

disguise (vt.) – To hide the true nature or reason of something.

mask (vt.) – To conceal a feeling or reason behind a different appearance.

🌱 Derivatives

underlying (adj.) – Being the real but hidden cause.