sub
/sʌb/
A submarine.
A submarine sandwich: a sandwich made on a long bun.
We can get subs at that deli.
A substitute, often in sports.
She worked as a sub until she got her teaching certificate.
(often in plural) A subscription: a payment made for membership of a club, etc.
A subtitle.
I've just noticed a mistake in the subs for this film.
A subroutine (sometimes one that does not return a value, as distinguished from a function, which does).
A subeditor.
A subcontractor.
(BDSM) A submissive.
A subordinate.
A subaltern.
A subscription (or (by extension) a subscriber) to an online channel or feed.
I'm totally stoked; just got 10 new subs after my last video.
Subsistence money: part of a worker's wages paid before the work is finished.