κύμβαχος

Etymology
According to Leumann, the divergent meanings should be explained from an original substantival, technical sense. The formation favors this as well: compare especially and. The form has been taken as the basis, but this is unconvincing. Other have started from a nasalized form of : this form without prenasalization shows that the word is.

Adjective

 * 1) falling headfirst

Noun

 * 1) crown, crest of a helmet