假定

假定	jiǎ dìng	to assume / to suppose / supposed / so-called / assumption / hypothesis
假	gēi	used in 假掰
假	jiǎ	fake / false / artificial / to borrow / if / suppose
假	jià	vacation
假	jiǎ	to borrow (variant of 假)
定	dìng	to fix; to set; to make definite / to subscribe to (a newspaper etc); to book (tickets etc); to order (goods etc) / to congeal; to coagulate / (literary) definitely