inadequacy

IPA/ɪnˈædɪkwəsi/
KK[ˌɪnˈædɪkwəsi]IPA/ɪnˈædɪkwəsi/

inadequacy — noun

  • inadequacysingular
  • inadequaciesplural

1. a situation in which something does not reach the expected standard or is presen

1.nounB2
Definition

a situation in which something does not reach the expected standard or is present in an amount that is too small — for example, when a hospital lacks enough beds for its patients, or when a harvest provides too little food to feed the whole village

Example

Samir pointed out the inadequacy of the school library, which had only fifty books for four hundred students.

the inadequacy of [something]

The safety report blamed the inadequacy of the fire exits for the slow evacuation during the drill.

Common collocations
  • inadequacy of resources
  • inadequacy of funding
  • inadequacy of the system
  • gross inadequacy
  • inadequacy of evidence
Synonyms
  • insufficiency

    more technical or formal; focuses on quantity rather than quality

  • deficiency

    suggests a lack of something essential, often in health, nutrition, or systems

  • shortage

    primarily about quantity; used when there is not enough of something people need

  • lack

    more general and slightly less formal; can apply to both quality and quantity

Antonyms
  • adequacy

    the opposite state — being sufficient or meeting the standard

  • sufficiency

    having enough of what is needed

Grammar Patterns

the inadequacy of [something]

Usage Note

Frequently used with the preposition 'of' to specify what is insufficient: the inadequacy OF (staff, funding, resources, etc.). This is the most common grammatical pattern for this sense.

Common Mistakes

The inadequacy of the staffs was clear.
The inadequacy of the staff was clear.
'staff' is an uncountable collective noun and does not take -s.
There is inadequacy in healthcare system.
There is inadequacy in the healthcare system.
'inadequacy' followed by a singular countable noun needs a determiner.

2. a feeling of self-doubt in which you believe you are not capable enough, skilled

2.nounB2
Definition

a feeling of self-doubt in which you believe you are not capable enough, skilled enough, or good enough to handle a task, role, or situation — for example, worrying that your answers in a job interview are not smart enough, or feeling unable to lead a group discussion

Example

Amara's feelings of inadequacy kept her from applying for the manager position that she secretly wanted.

feelings of inadequacy — often in plural

Despite years of experience, Xin admitted to a deep sense of inadequacy whenever she had to speak at a conference.

a sense of inadequacy

Common collocations
  • feelings of inadequacy
  • a sense of inadequacy
  • deep inadequacy
  • personal inadequacy
  • overcome inadequacy
Synonyms
  • insecurity

    broader — can refer to lack of confidence in many areas, not just ability

  • self-doubt

    more direct and specific; focuses on questioning one's own capability

  • uncertainty

    less intense; can refer to doubt about facts or decisions, not just oneself

Antonyms
  • confidence

    the opposite feeling — believing in your own ability

  • self-assurance

    a calm trust in your own judgment and skills

Grammar Patterns

a feeling/sense of inadequacy

feelings of inadequacy

Usage Note

Often appears in the fixed expressions 'feelings of inadequacy' (plural) or 'a sense of inadequacy' (singular). The subject is typically a person experiencing imposter syndrome or low self-confidence. This sense is always about a personal psychological state, never about external objects or systems.

Common Mistakes

The inadequacy of my salary made me feel bad.' (using sense 2 when you mean sense 1).
The inadequacy of my salary meant I could not pay the bills.' (sense 1
insufficient amount) vs 'I felt a deep sense of inadequacy when my boss praised my colleagues but not me.' (sense 2 — self-doubt). — Use sense 1 for external insufficiency; use sense 2 for internal self-doubt about your own abilities.

Word family

Synonym discussion

Sense: noun/1

All five words describe something falling short of what is needed, but they differ in scope and emphasis. 'Inadequacy' (B2) covers both insufficient quantity AND poor quality — a hospital can suffer from inadequacy of both staff numbers and staff training. 'Insufficiency' (C1) is more formal and focuses strictly on quantity: an insufficiency of clean water is a numerical problem. 'Deficiency' (B2) often implies that something essential is missing or lacking in the right proportion, especially in health (vitamin deficiency) or systems (security deficiency). 'Shortage' (B1–B2) is the most concrete, everyday word for not having enough of a countable resource: a housing shortage, a shortage of nurses. 'Lack' (A2) is the broadest and least formal — 'a lack of sleep', 'a lack of interest' — and can be used in almost any context. For academic or professional writing about structural problems, 'inadequacy' is the most precise choice because it flags both quantity and quality failures at once.

inadequacy ↗insufficiency ↗deficiency ↗shortage ↗lack ↗

Common collocations

Nouns

Adverbs

Phrases

  • inadequacy of the system
  • sense of inadequacy
  • feelings of inadequacy

Prepositions

Etymology

LatinFrenchEnglish

The noun 'inadequacy' was formed in English around the late 1700s from 'inadequate' (meaning 'not enough') plus the noun suffix '-cy'. 'Inadequate' itself came from Latin 'inadequatus', which combined the negative prefix 'in-' ('not') with 'adaequatus' ('made equal'), the past participle of 'adaequare' ('to make equal'). At its root, the word carries the idea of something that does not measure up or is not on the same level as what is needed.