What does tumefy mean?
Tumefy is a formal or medical verb meaning to become swollen or to make a body part swell. It is especially used of tissue affected by injury, inflammation, infection, or another abnormal process, although its more general sense allows any enlargement. The word has a deliberately learned, somewhat old-fashioned tone and is much less common in everyday speech than swell, inflate, or distend. Its value in modern writing is chiefly precision: it identifies swelling as a notable change in condition rather than merely a gradual increase in size. A clinician might say that a lymph node has begun to tumefy, while a technical writer might use the verb for material that expands under pressure. Because it is uncommon, the simpler verb may be preferable when the cause and significance of the swelling do not need emphasis.
verbTo become swollen, or to cause a body part or tissue to swell, especially as a result of disease, injury, or another abnormal process.
- To become swollen or enlarged.
- To cause a body part or tissue to swell.
"The infected lymph nodes began to tumefy over the following day."
"The abscess continued to tumefy over the next two days."
"Pressure from the impact caused the tissue to tumefy rapidly."
Tumefy sounds like a clinical command: make tissue swell—or become swollen yourself.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does tumefy come from?
Tumefy comes through French tuméfier from the Latin tumefacere, “to make swollen,” formed from tumēre, “to swell,” and facere, “to make.” It entered English in the early 17th century. Related forms such as tumefaction and tumefacient reflect the same Latin source, while cognates in other European languages also derive from tumefacere.
Related word forms
How tumefy is actually used
Formal and chiefly medical or technical; rare in ordinary contemporary English. Both transitive (“cause to swell”) and intransitive (“become swollen”) uses are established.