halitosis

American  

[hal-i-toh-sis] / ˌhæl ɪˈtoʊ sɪs /

noun

1. a condition of having unpleasant-smelling breath.

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halitosis British  

/ ˌhælɪˈtəʊsɪs /

noun

1. the state or condition of having bad breath

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Etymology

Origin of halitosis

From New Latin, dating back to 1870–75; see origin at halitus, -osis

Explanation

If you notice that your friends have been keeping their distance lately, they might be mad at you — or it could be your halitosis. Halitosis is a fancy way to say "bad breath." A dentist or doctor is probably most likely to use the word halitosis, although it often comes up in mouthwash commercials too. The word itself comes from a merging of the Latin root halitus, or "breath," with the Greek suffix osis, "a state of disease." It's a condition with which you can actually be diagnosed, although it can usually be taken care of with a toothbrush and a tube of toothpaste.

Example Sentences

"Different antimicrobial mouthwashes, whether available over-the-counter or on prescription, can be used in the management of gingivitis, dental caries, periodontal diseases, halitosis, etc."

From Science Daily • Dec. 8, 2025

After reading all of the instant accusations against Walz, I was half expecting to hear he had flat feet, eczema, psoriasis and halitosis.

From Salon • Aug. 8, 2024

Then there was the fella in Westchester, who had serious halitosis, who leaned in for a kiss after dinner.

From Los Angeles Times • Oct. 27, 2023

The authors concluded “Despite the limitations of this meta-analysis, we believe that some probiotics have a beneficial effect on halitosis, although more clinical trials are needed to establish real evidence on this aspect.”

From Seattle Times • Apr. 27, 2022

They hadn’t gotten this far just to be killed by whale halitosis.

From "Aru Shah and the End of Time" by Roshani Chokshi