IPA: //ˈhoʊmbruː//
KK: /hoʊmbru/
A drink, usually beer, that is made by someone at home instead of being bought from a store.
He enjoys making his own homebrew on the weekends.
Homebrew is formed from "home" (from Old English *ham*, meaning dwelling or residence) and "brew" (from Old English *breowan*, meaning to prepare or make, especially in reference to brewing beverages). The word "homebrew" refers to beverages made at home, particularly beer or other fermented drinks.
Think of a 'dwelling' ('home') where you 'prepare' ('brew') your own drinks — that's what homebrew means.