IPA: /ˈbiːfɪli/
KK: /ˈbifiˌli/
In a way that is strong or muscular, often used to describe someone who is well-built or has a lot of muscle.
He lifted the weights beefily, showing off his strength.
The word 'beefily' is derived from 'beef' (from Old French *beuf*, meaning the flesh of a cow) and the suffix '-ily' (meaning in a manner of). Therefore, 'beefily' describes something done in a manner relating to beef or meat.
Think of 'beef' as the meat from a cow, and remember that 'beefily' means doing something in a way that relates to beef.