Literally meaning: “inflammation of a tendon”
Origin: Anc Greek
τείνω/teino (=extend) > τανύω/tanyo(=strain, stretch) > ταινία/taenia(=band, ribon)
+(-ίτις)/-ιτις (=-itis, suffix meaning “pertaining to” or “inflammation”.) It is in feminine gender because it was used with feminine noun η νόσος/ e nosos /(=disease).
Tendonitis is the inflammation of a tendon that is characterized by pain at tendinous insertions into bone.