彼はみんなを笑わせるバカな顔をした

Meaning
he made a silly face that made everyone laugh

Vocab used in this sentence

he, his, him, boyfriend
a, the, is, am, are, will
みんな
everyone, all, guys, everybody
o, the, to, wo
笑う
laugh, smile, giggle, chuckles
せる
make, let, to make, to do, to perform, to cause
バカ
dumb, stupid, idiot, fool, moron
a, the, na, nan, nai
face, look, expression, features, countenance
o, the, to, wo
and, shi, four, death
the, was, ta, da, other