buoyancy
/ˈbɔɪənsi/ (bre, ipa) · [bˈɔɪənsi] /ˈbɔɪənsi/ (ame, ipa) · [bˈɔɪənsi] /ˈbȯi-ən(t)-sē How to pronounce buoyancy (audio) ˈbü-yən(t)-/ (ame, mw)
buoyancy — noun
1. the ability of a body or object to stay on the surface of water or another liqui
the ability of a body or object to stay on the surface of water or another liquid, or to be pushed upward by it
The rescue jacket's buoyancy kept Christopher above the waves until the boat returned.
keep + person above the waves
Divers tested the buoyancy of each foam panel before building the floating dock.
buoyancy of + object/material
Warm salt water gives swimmers more buoyancy than the cold lake does.
Tanvi added air to the raft to improve its buoyancy near the rocks.
- floatability
technical and much less common in everyday English
- lift
focuses on upward force, especially in science or engineering
文法句型
the buoyancy of + object/material
more buoyancy than + object
improve buoyancy
用法筆記
Usually used as an uncountable noun in discussions of boats, life jackets, materials, and swimming conditions. Distinguish from sense 3, which describes a person's positive spirit rather than floating force.
2. a condition in which prices, demand, or business activity stay strong and financ
a condition in which prices, demand, or business activity stay strong and financially healthy
Lower fuel costs restored buoyancy to the airline after a difficult spring.
restore buoyancy to + business
Investors pointed to the market's buoyancy when new shops opened across town.
market's buoyancy
Even after the storm, cafe owners saw buoyancy in weekend bookings.
Strong export orders gave the small factory unexpected buoyancy this quarter.
- strength
broader and less tied to markets or prices
- resilience
emphasizes recovery after pressure more than strong trading conditions
- vitality
suggests active energy, often in a business or local economy
文法句型
buoyancy in + market/business
restore buoyancy to + business
give + business/market + buoyancy
用法筆記
Most common in business or economic reporting, especially with words like market, prices, sales, demand, and bookings. Distinguish from sense 1, which is literal floating ability, and from sense 3, which is about a person's spirit.
3. cheerful confidence that keeps someone lively and hopeful even when life is diff
cheerful confidence that keeps someone lively and hopeful even when life is difficult
Despite the exam delay, Sayaka spoke with buoyancy about the next attempt.
speak with buoyancy after trouble
Noa's buoyancy lifted the whole kitchen after the power cut spoiled dinner.
buoyancy lifted the whole room
There was real buoyancy in the class once the missing dog came home.
After months of treatment, Iris returned with the same buoyancy and quick laugh.
- cheerfulness
focuses on visible happiness more than inner resilience
- optimism
stresses hope about the future more than lively energy
- resilience
emphasizes recovery and toughness more than lightness of spirit
- gloominess
suggests a low, heavy mood instead of light confidence
- discouragement
shows a drop in hope and spirit after problems
文法句型
with buoyancy
buoyancy in + voice/mood
return with buoyancy
用法筆記
Often appears in descriptions of a person's tone, manner, or general mood after difficulty. Distinguish from sense 2, which describes strong commercial conditions rather than emotional energy.