定数

定数	dìng shù	constant (math.) / quota / fixed number (e.g. of places on a bus) / fixed quantity (e.g. load of truck) / destiny
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
数	shǔ	to count / to count as; to regard as / to enumerate; to list
数	shù	number; figure / several; a few
数	shuò	(literary) frequently; repeatedly