noun · 5 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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Australian, UK:/ɪnˈɜː.ʃə/
Australian, UK:/ɪˈnɜː.ʃə/
Southern-England:Recorded audio is listed in the source snapshot.
US:/ɪnˈɝ.ʃə/
US:/ɪˈnɝ.ʃə/
New-Jersey:Recorded audio is listed in the source snapshot.
rhymes with -ɜː(ɹ)ʃə
CMU ARPABET:IH2 N ER1 SH AH0
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
The property of a body that resists any change to its uniform motion; equivalent to its mass.
Definition source: English Wiktionary via Wiktextract
(physics) the tendency of a body to maintain its state of rest or uniform motion unless acted upon by an external force
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: mechanical phenomenon
Narrower terms: moment of inertia
History
Etymology
From Latin inertia (“lack of art or skill, inactivity, indolence”), from iners (“unskilled, inactive”), from in- (“without, not”) + ars (“skill, art”). Something close to the modern physics sense was first used in New Latin by Johannes Kepler.
Across languages
Translations
90 source translations are retained for this English entry.
Albanian:
inerci
— in physics
Arabic:
عَطَالَة
(ʕaṭāla)
— in physics
Azerbaijani:
ətalət
— in physics
Bulgarian:
инерция
(inercija)
— in physics
Catalan:
inèrcia
— in physics
Chinese Mandarin:
慣性 /惯性
(guànxìng)
— in physics
Czech:
setrvačnost
— in physics
Dutch:
inertie
— in physics
Dutch:
traagheid
— in physics
Esperanto:
inerteco
— in physics
Esperanto:
inerteca forto
— in physics
Esperanto:
inertforto
— in physics
Estonian:
inerts
— in physics
Estonian:
inertsus
— in physics
Finnish:
hitaus
— in physics
Finnish:
inertia
— in physics
Finnish:
vitka
— in physics
Finnish:
jatkavuus
— in physics
French:
inertie
— in physics
German:
Trägheit
— in physics
German:
Beharrungsvermögen
— in physics
German:
Beharrung
— in physics
Greek:
αδράνεια
(adráneia)
— in physics
Hawaiian:
ehuō
— in physics
Hindi:
अक्रियता
(akriytā)
— in physics
Hungarian:
tehetetlenség
— in physics
Irish:
táimhe
— in physics
Italian:
inerzia
— in physics
Japanese:
慣性
(kansei)
— in physics
Kazakh:
инерция
(inersiä)
— in physics
Khmer:
និចលភាព
(nĭchlôphéap)
— in physics
Latin:
inertia
— in physics
Latvian:
inerce
— in physics
Malay:
inersia
— in physics
Malayalam:
ജഡത്വം
(jaḍatvaṁ)
— in physics
Māori:
tūpuku
— in physics
Norwegian:
treghet
— in physics
Norwegian:
treighet
— in physics
Polish:
bezwładność
— in physics
Polish:
inercja
— in physics
Portuguese:
inércia
— in physics
Romanian:
inerție
— in physics
Russian:
ине́рция
(inɛ́rcija)
— in physics
Scottish Gaelic:
do-mhùthadh
— in physics
Spanish:
inercia
— in physics
Swedish:
tröghet
— in physics
Tagalog:
tigal
— in physics
Tamil:
சடத்துவம்
(caṭattuvam)
— in physics
Tamil:
நிலைமம்
(nilaimam)
— in physics
Telugu:
జడత్వము
(jaḍatvamu)
— in physics
Thai:
ความเฉื่อย
(kwaam-chʉ̀ai)
— in physics
Turkish:
eylemsizlik
— in physics
Ukrainian:
іне́рція
(inércija)
— in physics
Vietnamese:
quán tính
— in physics
Arabic:
عَطَالَة
(ʕaṭāla)
— unwillingness to take action
Bulgarian:
мудност
(mudnost)
— unwillingness to take action
Bulgarian:
вялост
(vjalost)
— unwillingness to take action
Catalan:
inèrcia
— unwillingness to take action
Dutch:
daadloosheid
— unwillingness to take action
Estonian:
tegevusetus
— unwillingness to take action
Estonian:
loidus
— unwillingness to take action
Finnish:
vastahakoisuus
— unwillingness to take action
German:
Trägheit
— unwillingness to take action
German:
Schwerfälligkeit
— unwillingness to take action
German:
Unbeweglichkeit
— unwillingness to take action
Hindi:
निष्क्रियता
(niṣkriytā)
— unwillingness to take action
Hungarian:
tétlenség
— unwillingness to take action
Irish:
spadántacht
— unwillingness to take action
Italian:
inerzia
— unwillingness to take action
Japanese:
惰性
(dasei)
— unwillingness to take action
Latin:
inertia
— unwillingness to take action
Polish:
inercja
— unwillingness to take action
Polish:
bezwładność
— unwillingness to take action
Portuguese:
inércia
— unwillingness to take action
Russian:
ине́ртность
(inɛ́rtnostʹ)
— unwillingness to take action
Russian:
вя́лость
(vjálostʹ)
— unwillingness to take action
Scottish Gaelic:
leisg
— unwillingness to take action
Scottish Gaelic:
do-mhùthadh
— unwillingness to take action