always used before a noun
: of or relating to work (such as fixing or building something) that you do yourself instead of hiring someone to do it
a do-it-yourself [=DIY] home improvement project
do-it-yourself home repair
do-it-yourself stores [=stores where you buy materials to fix or build things]
— do–it–yourselfer noun, plural do–it–yourselfers [count]
a how-to guide for do-it-yourselfers