inexcusable

adjective

in·​ex·​cus·​able ˌi-nik-ˈskyü-zə-bəl 

: impossible to excuse or justify

inexcusable rudeness

inexcusableness noun

inexcusably

ˌi-nik-ˈskyü-zə-blē 

adverb

Synonyms of inexcusable

• unacceptable
• unforgivable
• unjustifiable
• outrageous
• unpardonable
• indefensible

Examples of inexcusable in a Sentence

spitting at a teacher is inexcusable behavior and will be severely punished

Recent Examples on the Web

But the four losses to egregious tankers were inexcusable. —Barry Jackson, Miami Herald, 30 Mar. 2026

The most inexcusable of these mandates in recent times was Springfield’s sweetening of pension benefits for certain police and firefighters in Chicago in 2025. —The Editorial Board, Chicago Tribune, 30 Mar. 2026

Skipping that view may seem like an inexcusable oversight. —New York Times, 16 Mar. 2026

For the fifth consecutive year, Vulture has gathered two anonymous Rock Hall voters to share the good, the bad, and the inexcusable for the 2026 nominees. —Devon Ivie, Vulture, 12 Mar. 2026

Word History

Etymology

Middle English, from Latin inexcusabilis, from in- + excusabilis excusable

First Known Use

15th century, in the meaning defined above

Rhymes for inexcusable

• diffusible
• excusable
• infusible
• reusable
• unusable
• fusible
• usable

Kids Definition

inexcusable

adjective

in·​ex·​cus·​able ˌin-ik-ˈskyü-zə-bəl 

: too bad to be excused : not justifiable

inexcusable rudeness

inexcusably

-blē 

adverb