Sub
/sʌb/noun
A prefix meaning under, below, or beneath; also used in English as a noun for a submarine, substitute, or submissive role in certain contexts.
Did you know?The same ancient root behind *sub* also helped shape words like *support* and *subject*, showing how often English encodes power as literally being placed “under.”
Etymological Timeline
Proto-Indo-European
PIE
*upo
“under, beneath”
Proto-Italic
Italic
*subo
“under, below”
Latin
Latin
sub
“under, beneath, up from under”
Old French
OF
sou-
“under; prefix used in borrowed compounds”
Middle English
English
sub-
“prefix meaning under, below, or secondary”
Modern English
English
sub
“a person or thing that is secondary, subordinate, or beneath another in rank or position”