English
subaudio
sub- + audio
Proto-Indo-European *upó ‘up; from below’
Proto-Italic *supo ‘under’
Latin sub ‘under, beneath, below’
English sub-
Today it means
adj Of a lower frequency than the range that can be heard by humans.
Sources
Sources: Wiktionary, “subaudio”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / subaudio