"L'acqua nel bicchiere bolle."
December 29, 2012
Seems like the conjugations of "bollire" are missing from Duo's definitions so here they are: (to boil) = bollire: io bollo, tu bolli, lui/lei bolle, noi bolliamo, voi bollite, loro bollono.
Although I'm sure "bolle" will be the most common word.
June 26, 2013