sub
noun
[ sʌb ]
• a submarine.
• "the yachtsman claimed his boat had been sunk by a sub"
• a subscription.
• "the annual sub for the golf club will be £200"
• a substitute, especially in a sporting team.
• "the team pulled back with a goal from sub Chris Malkin"
• a subeditor.
• "the chief sub would be responsible for the look of the paper"
• an advance or loan against expected income.
• "‘I've got no money.’ ‘Want a sub?’"
sub
verb
• replace or be replaced; substitute.
• "he got a lot of applause when he was subbed"
• lend or advance a sum to (someone) against expected income.
• "who'll sub me till Thursday?"
• subedit.
• "his copy was mercilessly subbed and rewritten"
sub-
prefix
• at, to, or from a lower level or position.
• "subalpine"
• somewhat; nearly; more or less.
• "subantarctic"
• denoting subsequent or secondary action of the same kind.
• "sublet"
• denoting support.
• "subvention"
• in names of compounds containing a relatively small proportion of a component.
• "suboxide"
Origin:
from Latin sub ‘under, close to’.