superfix

UK: /ˈsuːpəˌfɪks/ US: (so̅o̅′pər fiks′)

WordReference Random House Unabridged Dictionary of American English © 2025

su•per•fix  (so̅o̅′pər fiks′), n. 

1. Phonetics a suprasegmental feature having an identifiable meaning or grammatical function, as the stress pattern that distinguishes the noun record from the verb record or the parallel falling stress patterns of blackbird and highchair, reflecting a parallel relationship between the elements.

• super- + -fix, extracted from affix, infix, etc. 1945–50

Collins Concise English Dictionary © HarperCollins Publishers::

superfix / ˈsuːpəˌfɪks/ noun

1. a suprasegmental feature distinguishing the meaning or grammatical function of one word or phrase from that of another, as stress does for example between the noun conduct and the verb conduct

Etymology: from super- + -fix, on the model of prefix, suffix