A–Z Vocabulary
Strong IELTS words starting with U — ubiquitous, unprecedented, undermine and more — with definitions, examples and memory tricks.
10 / 10 words
adjective
Definition
Present, appearing, or found everywhere.
Example sentence
“Smartphones have become so ubiquitous that they shape virtually every aspect of modern life.”
Memory trick
Sounds like 'you-BIQ-uitous' — you bicker at it everywhere; it's everywhere.
Common collocations
adjective
Definition
Never done or known before.
Example sentence
“The pandemic produced unprecedented disruptions in global supply chains and labour markets.”
Memory trick
'Un-' (not) + 'precedent' — no precedent exists.
Common collocations
verb
Definition
To erode the base or foundation of something; to weaken gradually.
Example sentence
“Misinformation campaigns can systematically undermine public trust in scientific institutions.”
Memory trick
Like digging a mine 'under' something to make it collapse.
Common collocations
verb
Definition
To support, justify, or form the basis for something.
Example sentence
“Strong property rights underpin most successful market economies.”
Memory trick
Putting a pin underneath to hold something up.
Common collocations
verb
Definition
To emphasise; to draw attention to.
Example sentence
“Recent extreme weather events underscore the urgency of climate adaptation planning.”
Memory trick
Drawing a line under text to underline its importance.
Common collocations
verb
Definition
To confirm or support something challenged; to maintain a principle.
Example sentence
“Independent courts play a vital role in upholding constitutional rights against political pressure.”
Memory trick
Holding something up — uphold = support, maintain.
Common collocations
adjective
Definition
Leaving no doubt; unambiguous.
Example sentence
“There is now unequivocal scientific evidence that human activity is driving global warming.”
Memory trick
'Un-' (not) + 'equi-vocal' (equal voices) — no second voice, no doubt.
Common collocations
verb
Definition
To make practical and effective use of.
Example sentence
“Cities can utilise unused rooftops to expand solar power generation without consuming additional land.”
Memory trick
From 'utility' — utilise means to put to use.
Common collocations
noun
Definition
The process by which more and more people leave the countryside to live in cities.
Example sentence
“Rapid urbanisation is straining housing, transport, and sanitation systems in many developing economies.”
Memory trick
'Urban' + '-isation' — turning rural into urban.
Common collocations
adjective
Definition
Performed by or affecting only one side or party.
Example sentence
“Unilateral action on climate change is unlikely to succeed without broader international cooperation.”
Memory trick
'Uni-' (one) + 'lateral' (side) — one side acting alone.
Common collocations