Definitions

weakness

[week-nis] / ˈwik nɪs /

NOUN

defect, proneness

Synonyms

STRONGEST

deficiency failing flaw fragility frailty gap instability lack lapse shortcoming vulnerability

STRONG

appetite blemish debility decrepitude delicacy enervation faintness fault feebleness fondness impairment imperfection impotence inclination inconstancy indecision infirmity invalidity irresolution languor liking passion penchant powerlessness predilection proclivity prostration senility taste vice vitiation

WEAK

Achilles heel chink in armor soft spot sore point

Antonyms

STRONGEST

advantage perfection strength strong point success

STRONG

ability health robustness soundness

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

One additional factor upsetting investors of late has been the continual weakness of the Korean currency USDKRW.

From MarketWatch • Jun. 9, 2026

Economists widely anticipate no change to the Bank of Canada’s benchmark rate given weakness in the economy to start the year and the risk of higher inflation due to energy prices.

From The Wall Street Journal • Jun. 9, 2026

Some economists say the weakness could persist due to uncertainty surrounding the Middle East conflict.

From The Wall Street Journal • Jun. 8, 2026

Within weeks the boldness of the United Bid became its weakness.

From Los Angeles Times • Jun. 7, 2026

It turned out that the Soviet one-time pad system had a weakness.

From "Spies: The Secret Showdown Between America and Russia" by Marc Favreau

Vocabulary lists containing weakness

Florida's B.E.S.T. Common Suffixes: -ness

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Unit 1, Week 4

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The Suffix -ness, Part 1

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