喉癌 (hóu ái) literally means 'throat cancer' — 喉 (hóu) means 'throat' or 'larynx', and 癌 (ái) means 'cancer'. It is a medical term referring specifically to malignant tumors that develop in the pharynx, larynx, or other parts of the upper respiratory and digestive tract. Unlike general terms like 癌症 (cancer), 喉癌 specifies the anatomical location, making it precise in clinical and health-related contexts.

This word is used primarily in formal medical settings — for example, in diagnoses, public health campaigns, or patient education materials. It is not used colloquially or metaphorically; speakers do not say 喉癌 to describe non-medical problems. Pronunciation is important: both characters carry second-tone marks (hóu ái), and mispronouncing either tone may cause confusion with unrelated words like 后 (hòu, 'after') or 爱 (ài, 'love').