Other forms: wedlocks
The noun wedlock means marriage; you might describe your newly-married sister as "entering the magical state of wedlock."
Wedlock is an old-fashioned word for matrimony, the state of being married. It comes up most often in the phrase "out of wedlock," when gossipers are describing a baby born to unmarried parents. Even though wedlock sounds like it would have a root meaning of "locked into marriage," it actually comes from the Old English wedlac, from wed, "pledge," and lac, which denotes action.