Difference between Loosen and Tighten

LOOSEN vs TIGHTEN: VERB

To make loose; to free from tightness, tension, firmness, or fixedness; to make less dense or compact
To remove costiveness from; to facilitate or increase the alvine discharges of.
To free from restraint; to set at liberty..

To make loose; free from tightness, tension, firmness, or fixedness: as, to loosen a knot; to loosen a joint; to loosen a rock in the earth.
To render less dense or compact: as, to loosen the soil about the roots of a plant.
To let loose; free from restraint or confinement.
To become loose; become less tight, firm, or compact.

Severely restrict in scope or extent
To become tight; be drawn tighter.
To make tight; draw tighter; straiten; make more close in any manner; constrict.
(transitive; intransitive verb) To make or become tight or tighter.

Unscrew, Remove, Relieve, Undo, Unfasten, Ease, Untie, Slacken, Soften, Lighten, Tighten, Tease apart, Tease, Loose, Relax

Adjust, Bolster, Intensify, Tight, Improve, Restrict, Strengthen, Toughens, Toughen, Loosen, Tighten up, Reduce, Constrain, Fasten, Stiffen

Defuse, Detach, Unscrew, Remove, Relieve, Undo, Unfasten, Ease, Untie, Slacken, Soften, Tighten, Tease, Loose, Relax

Squeeze, Harden, Adjust, Bolster, Intensify, Tight, Improve, Restrict, Strengthen, Loosen, Tighten up, Reduce, Constrain, Fasten, Stiffen

But we can loosen things up even further.
But what happens when we loosen these chains?
Australian states will loosen their restrictions this week.
Allow the tape to loosen on its own.
Helps loosen the hamstrings, adductors and hip flexors.
Do easy stretches to loosen up your muscles.
He also could help Iowa fans loosen up.
Before you stitch loosen the upper thread tension.
Do not rub or try to loosen the henna with your hands, let the water itself loosen.
Loosen and remove cap screws securing sheaves to If applicable, loosen keyway set screws.

Tighten web applications security for Apache Modsecurity is an Apache module whose purpose is to tighten the Web application security.
If a torque wrench is unavailable, finger tighten the spark plug, then use a plug wrench to tighten.
On the left side of the firearm, tighten the cap screw on firmly, but do not tighten all the way.
Have someone where you had your eyeglasses adjusted tighten the screws or purchase an eyeglass screwdriver set and tighten the screws regularly yourself.
Harness leg loops are easier to tighten, and pupils can often tighten their own, if not the case follow same procedure as waist belt.
Tighten the two screws using the screwdriver, do not over tighten.
Lastly tighten all clamps, and tighten the mounting base to clamp the unit in.
People are having to tighten their belts, so the government should tighten its belt too.
But maybe tighten up or atleast tighten your lip when commenting to me.
Tighten the bolts securely, but do not over tighten.