Where does “infrasyllabic” come from?

infrasyllabic (English) comes from English infra, from Latin infra, from Latin īnferā, from French inférer, from Latin īnferō, from Latin īn-, from Latin în, from Latin en — in.

infrasyllabic (English): Smaller than a syllable

Definitions

Smaller than a syllable

Ancestry of “infrasyllabic”, step by step

infrasyllabic traces back through two separate lines of ancestry.

via English infra

Step	Language	Word	Meaning
1	English	infra	Discussed later; Infrastructure
2	Latin	infra	below
3	Latin	īnferā	—
4	French	inférer	to infer
5	Latin	īnferō	to carry, bring, put, place, or throw in, into, to, or upon somewhere or something; insert
6	Latin	īn-	un-, non-, not
7	Latin	în	in, at, on, upon, from (space)
8	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
9	Proto-Italic	en	in
10	Proto-Indo-European	h₁én	in

via English syllabic

Step	Language	Word	Meaning
1	English	syllabic	Of, relating to, or consisting of a syllable or...
2	Medieval Latin	syllabicus	—
3	Ancient Greek	συλλαβικός	—
4	Ancient Greek	συλλαβή	conception, pregnancy; that which holds together,...
5	Ancient Greek	συλλαμβάνω	I collect, gather; I rally; I take hold of,...
6	Ancient Greek	σῠν-	together; with, together
7	Ancient Greek	σύν	beside, with
8	Proto-Hellenic	*ksún	beside, with

Every word from Proto-Indo-European h₁én →Every word from Latin īn- →Every word from Proto-Italic en →