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Below; under; beneath: subcutaneous.
Subordinate; secondary: subinfection.
Less than completely or normally; nearly; almost: subfertility.
A prefix that means "underneath or lower" (as in subsoil), "a subordinate or secondary part of something else" (as in subphylum.), or "less than completely" (as in subtropical.)
A substitute of any sort, esp an athlete who replaces another or an athlete not on the first team (1830+)verb
: Who'll sub for me when I go on leave? (1853+)
for forming adjectives Inferior to or imitative of what is indicated: sub–Woody Allen (1963+)
hero sandwich • Also hoagy, torpedo, grinder, poor boy, etc depending on the locality
[1960s+; fr the shape of the bread cut lengthwise for the sandwich]