Lax (adjective)

1. Not strict or severe in discipline or control.
2. Not tight or rigid; loose.
3. Not adhering to a standard of correctness or exactness.

Origin:

Mid 16th century: from latin laxus "loose".

Examples:

1. The teacher was lax in enforcing the rules.
2. The lax security allowed the thief to enter the building.
3. The lax attitude of the employees resulted in a lack of productivity.
4. The lax muscles caused the joint to be unstable.
5. The lax regulations allowed for unsafe working conditions.