This is the 11701st most frequent Russian word.
забрызганы
"Splattered" or "spattered."
In this sentence, 'забрызганы' is used as a past passive participle indicating that the windows were subjected to splattering of dirty water.
Окна были забрызганы грязной водой после дождя.
The windows were splattered with dirty water after the rain.
Here, 'забрызгана' describes the result of an accidental event where his clothes became splattered with paint.
Его одежда оказалась забрызгана краской, когда он случайно задел банку.
His clothes ended up splattered with paint when he accidentally touched the can.
In this usage, 'забрызган' refers to the floor's state of being covered with marks or spots originating from dirty shoes.