limit
//ˈlɪmɪt//
Noun
limitsPlural
1
A point or level beyond which something does not or may not extend or pass
There is a limit to how much weight the bridge can support.
2
A restriction on the size or amount of something permissible or possible
There is a limit on the number of tickets you can buy.
3
The furthest extent of one's physical or mental endurance
I've reached my limit and need to rest.
Verb
1
To set or serve as a limit to; to restrict
We need to limit our spending this month.