arson

noun

ar·​son ˈär-sᵊn 

: the willful or malicious burning of property (such as a building) especially with criminal or fraudulent intent

Arson was determined to be the cause of the fire.

arsonist

ˈär-sᵊn-ist 

noun

arsonous

ˈär-sᵊn-əs 

adjective

Examples of arson in a Sentence

The cause of the fire has not yet been determined, but investigators suspect arson.

The town has suffered a rash of arson attacks.

The town has suffered a rash of arsons.

Recent Examples on the Web

In the United States, more than 554,000 arson offenses were recorded between 2015 and 2024. —Stefano Pozzebon, CNN Money, 26 Apr. 2026

The incident sparked an arson investigation, and anyone with information is asked to call 410-386-3050. —Jt Moodee Lockman, CBS News, 25 Apr. 2026

In 1983, the group’s headquarters was severely damaged in an arson attack. —Josh Meyer, USA Today, 25 Apr. 2026

There was a seed for this in the original manuscript; a vague suggestion that Richard, Cleo’s grandfather and one of the Chinese immigrant characters, had participated in an act of arson that had burned down the home of an Afro-Latina character named Lina. —Literary Hub, 23 Apr. 2026

Word History

Etymology

borrowed from Anglo-French arsun, arson, arsoun "fire, willful setting of a destructive fire, burn on the skin, branding," going back to Gallo-Romance *ārsiōn-, ārsiō, from Latin ārdēre (perfect and supine stem ārs-) "to catch fire, burn, blaze" + -tiōn-, -tiō, suffix of verbal action — more at ardent

Note: Outside of Anglo-French, arsun, arson (with a by-form arsion) is sparsely attested in Old and Middle French. Französisches etymologisches Wörterbuch notes that medieval attestations and later survivals are markedly regional (west and southwest France, including Normandy and Francophone Brittany). — The normal suffix of verbal action in later classical Latin and Late Latin was -tiōn-, -tiō, added to the verbal base (competing with the u-stem suffix -tus more common in earlier Latin), with the exception of a small number of formations with -iōn-, -iō (see condition entry 1, legion entry 1, region). Because the phonetic stem changes conditioned by the verbal adjective/past participle suffix -tus (Indo-European *-tos) are identical to those conditioned by -tiōn-, -tiō, new formations with this suffix in post-classical Latin and proto-Romance copy the morphophonemic alterations of the verbal adjective. This is evident in *ārsiō, formed from ārdēre. Note that the perfect ārsī and presumed (?) supine ārsum are most likely themselves analogical forms based on second-conjugation verbs such as mansī, mansum (from manēre "to wait, remain"), given that ārdēre (from āridus, ārdus "dry") cannot be of great antiquity in Latin.

First Known Use

circa 1680, in the meaning defined above

Rhymes for arson

• larsen
• parson

Kids Definition

arson

noun

ar·​son ˈär-sᵊn 

: the illegal burning of a building or other property

arsonist

-əst 

noun

Legal Definition

arson

noun

ar·​son ˈärs-ᵊn 

: the act or crime of willfully, wrongfully, and unjustifiably setting property on fire often for the purpose of committing fraud (as on an insurance company)

arsonist

-ist 

noun

Etymology

Anglo-French arsoun, alteration of Old French arsin, literally, conflagration, from ars, past participle of ardre to burn