Reading Theme:
Underlying: Definition, Usage & Examples (2 meaning)
Meaning 1：fundamental cause (underlying)
underlying
/ˌʌndərˈlaɪɪŋ/
adj.
Being the real and important reason for something, even if it is not obvious at first.
fundamental cause
➕
/ˌfʌndəˈmentl kɔːz/
adj.
Describes the most basic and important reason, condition, or factor that is not immediately visible but is responsible for a situation or symptom.
📘 Details & Usage
📖 Root Explanation
From under- (below) + lie (to rest) + -ing (present participle), meaning 'lying beneath'.
💡 Mnemonic
Think of a line UNDER a drawing. The UNDERLYING sketch supports the visible art above it.
📖 Example
The doctor said my headaches were just a symptom, and we needed to find the underlying cause, like stress or lack of sleep.
The doctor indicated that my headaches were merely a symptom, and it was necessary to identify the fundamental cause, such as stress or sleep deprivation.
🔗 Collocations
underlying cause – the basic reason behind a problem or symptom
underlying assumption – a basic belief that is taken for granted without proof
underlying problem – the root issue that is causing other difficulties
🔄 Synonyms
root (adj.) – of or relating to the fundamental cause or origin
fundamental (adj.) – forming a necessary base or core; of central importance
basic (adj.) – forming an essential foundation; fundamental
🚫 Antonyms
superficial (adj.) – existing or occurring at or on the surface
secondary (adj.) – coming after, less important than, or resulting from someone or something else that is primary
📖 Cultural Story
The word originates from Old English, combining 'under' and 'liegan' (to lie). It initially described physical position. In modern finance, 'underlying asset' is a key term, referring to the actual security (like a stock or commodity) that a derivative contract's value depends on.
Meaning 2：located beneath (underlying)
underlying
/ˌʌndərˈlaɪɪŋ/
adj.
Lying or situated under something else; forming the layer below.
located beneath
➕
/ləʊˈkeɪtɪd bɪˈniːθ/
adj.
Describes something that is positioned directly below or covered by another layer, surface, or object.
📘 Details & Usage
📖 Example
After I peeled off the old wallpaper, I found the underlying wall was in good condition and just needed a fresh coat of paint.
Once I removed the old wallpaper, I discovered the wall beneath it was in good shape and only required a new layer of paint.
🔗 Collocations
underlying layer – a stratum or coating that is situated beneath another
underlying structure – the foundational framework or support that is below the surface
underlying surface – the base material that is covered by something else
🔄 Synonyms
subsurface (adj.) – situated or occurring below the surface
substratal (adj.) – relating to or constituting a layer lying beneath another
beneath (prep./adv.) – extending or directly underneath
🚫 Antonyms
overlying (adj.) – lying over or on top of something
superficial (adj.) – of or relating to the surface or outer part
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