How Do You Spell← Check another word

How do you spell Diagnosis?

Correct spelling

diagnosis

DIAGN + OSIS. Think: know through.

Why is diagnosis spelled this way?

From Greek diagnosis, discernment. DIA (through) + GNOSIS (knowing). Knowing through examination. Same 'gnos' root as prognosis — knowing runs through medicine.

Common misspellings of diagnosis

diagnosesdiagnossisdiagnisisdiagnosos

Example

The diagnosis was confirmed.

Frequently asked questions

How do you spell diagnosis?+
The correct spelling is "diagnosis". DIAGN + OSIS. Think: know through.
Is it diagnoses or diagnosis?+
The correct spelling is "diagnosis", not "diagnoses". This word gets 10,000+ monthly searches.

Other commonly misspelled words

fiasco fiber fibre fibrillation

More spelling guides

genre genteel genuine geography

Never misspell a word again. Get weekly spelling tips and tricky word pairs in your inbox.

Looking up financial terms? MoneyTerms.app → — plain-English definitions for every money term you'll encounter.