tighten

As verbs the difference between tighten and constrict

is that tighten is to make tighter while constrict is to narrow, especially by applying pressure.

As verbs the difference between tighten and retightened

is that tighten is to make tighter while retightened is (retighten).

As a verb tighten

is to make tighter.

As a noun restriction is

the act of restricting, or the state of being restricted.

As a verb tighten

is to make tighter.

As a noun limit is

limit (restriction).

As verbs the difference between fixed and tighten

is that fixed is (fix) while tighten is to make tighter.

As an adjective fixed

is not changing, not able to be changed, staying the same.

As verbs the difference between snug and tighten

is that snug is to make secure or snug while tighten is to make tighter.

As a noun snug

is (british) a small, comfortable back room in a pub.

As an adjective snug

is comfortable; cosy (cozy); satisfactory.

As verbs the difference between torque and tighten

is that torque is to twist or turn something while tighten is to make tighter.

As a noun torque

is a rotational or twisting effect of a force; a moment of force, defined for measurement purposes as an equivalent straight line force multiplied by the distance from the axis of rotation (SI unit newton-metre or Nm; imperial unit foot-pound or ft.lbf).