burcu -bru- gismu

x1 is a brush for purpose x2 (event) with bristles x3.

See also komcu, pinsi.

In notes:

komcu
x1 is a comb [many-needled shape] of material x2 with tines/needles x3.
pinsi
x1 is a pencil/crayon/stylus applying lead/marking material x2, frame/support [of material] x3.
brupu'i
x1 applies/brushes x2 on surface x3
denbru
b1 is a toothbrush with bristles b3.
loibru
b1 is a broom for purpose b2 (event) with bristles b3.
terbru
x3=b1 is a brush for purpose x2=b2 (event) with bristles x1=b3.
vimtizbru
b1 is a toilet brush with bristles b3.