Syllabificating

First attested in 1968; formed as syllabification + -ing; compare the later syllabificate.

Full definition of syllabificating

Adjective

1. (non-standard, rare) That denote syllabic break.
• 1968, Proceedings of the 6th International Congress on Acoustics (Elsevier Pub. Co.), volumes 1–3, page B-156A record on one card consists of letter expression as an entry, phonemic expression (with stress mark and syllabificating mark if the word is polysyllabic), and possible functions of the word.

syllabificate + -ing

Verb

present participle

1. Present participle of syllabificate