incomprehensible

adjective

in·​com·​pre·​hen·​si·​ble (ˌ)in-ˌkäm-pri-ˈhen(t)-sə-bəl 

1

: impossible to comprehend : unintelligible

incomprehensible instructions

2

archaic : having or subject to no limits

incomprehensibility

(ˌ)in-ˌkäm-pri-ˌhen(t)-sə-ˈbi-lə-tē 

noun

incomprehensibleness noun

incomprehensibly

(ˌ)in-ˌkäm-pri-ˈhen(t)-sə-blē 

adverb

Synonyms

• impenetrable
• unfathomable
• ungraspable
• unintelligible

Examples of incomprehensible in a Sentence

I found his behavior utterly incomprehensible.

It's incomprehensible to me that he could have acted that way.

Recent Examples on the Web

In a brittle, anxious, nonlinear, incomprehensible (BANI) world where change is the only constant, the leadership traits that once earned respect—tenacity, decisiveness and stoicism—are no longer enough. —Arthi Rabikrisson, Forbes.com, 18 June 2025

Each episode represents an hour in the staff’s frenetic, 15-hour day that culminates with a mass casualty shooting and an incomprehensible case of the measles involving an unvaccinated child. —Lynette Rice, Deadline, 12 June 2025

All of us who loved her have had to find a way to make peace with her incomprehensible choice. —Liz McNeil, People.com, 3 June 2025

What was over the hill was unknown and what went on behind a nation's borders was incomprehensible. —David Szondy may 31, New Atlas, 31 May 2025

Word History

Etymology

Middle English, from Latin incomprehensibilis, from in- + comprehensibilis comprehensible

First Known Use

14th century, in the meaning defined at sense 2

Rhymes for incomprehensible

• comprehensible
• indefensible
• indispensable
• reprehensible
• supersensible
• compensable
• condensable
• defensible
• dispensable
• extensible
• insensible
• ostensible

Kids Definition

incomprehensible

adjective

in·​com·​pre·​hen·​si·​ble (ˌ)in-ˌkäm-pri-ˈhen(t)-sə-bəl 

: impossible to understand

found their behavior incomprehensible

incomprehensibility

-ˌhen(t)-sə-ˈbil-ət-ē 

noun

incomprehensibly

-ˈhen(t)-sə-blē 

adverb