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

Which is inexcusable, because Bridges — like Towns — is in one of the worst scoring seasons of his NBA career. —Kristian Winfield, New York Daily News, 24 Apr. 2026

These Dark Ages span an inexcusable 23 seasons — a stretch that began soon after the 2002 Raiders and admirable 37-year-old QB Rich Gannon were clobbered in Mission Valley, home to Super Bowl 37. —Tom Krasovic, San Diego Union-Tribune, 23 Apr. 2026

These are all inexcusable and counterproductive acts of violence. —Kyle Chayka, New Yorker, 15 Apr. 2026

The omission of any reference to South Carolina Head Coach Dawn Staley was inexcusable. —Letters To The Editor, Hartford Courant, 8 Apr. 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