Difference between Tighten and Constrain

TIGHTEN vs CONSTRAIN: VERB

To keep within certain limits; confine or limit.
To inhibit or restrain; hold back.
To compel by physical, moral, or circumstantial force; oblige.
To secure by bonds; to chain; to bond or confine; to hold tightly; to constringe.
To produce in a forced or inhibited manner.
To bring into a narrow compass; to compress.
To hold back by force; to restrain; to repress.
To compel; to force; to necessitate; to oblige.
To violate; to ravish.
To produce in such a manner as to give an unnatural effect.

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.

To confine or hold by force; restrain from escape or action; repress or compress; bind.
To check; repress; hinder; deter.
To force.
In mech.: To prevent the occurrence of (motion), except in a particular direction: as, the relative motions of the parts of any machine are always constrained.
To prevent the operation of the motion of (a material point or body), except in a particular and definite manner: as, to constrain a part of a mechanism.
In general, to exert force, physical or moral, upon, either in urging to action or in restraining from it; press; urge; drive; restrain.
Compel to behave in a certain way
To close within bounds, or otherwise limit or deprive of free movement
Hence To urge with irresistible power, or with a force sufficient to produce the effect; compel; necessitate; oblige.
Severely restrict in scope or extent

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

Constrict, Hinder, Circumscribe, Inhibit, Hamper, Undermine, Impede, Restrict, Curtail, Tighten up, Cumber, Stiffen, Tighten, Encumber, Restrain

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

Impair, Constrict, Hinder, Circumscribe, Inhibit, Hamper, Undermine, Impede, Restrict, Curtail, Tighten up, Stiffen, Tighten, Encumber, Restrain

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.

How do international capital markets constrain policy space?
UNIQUE constrain, because NULL is not a value.
Increased frequency of security patches can constrain operations.
Are historical records sufficient to constrain ENSO simulations?
United States to constrain China in the region.
The PCD TF does not further constrain thifield.
Did being a poet help or constrain you?
It may be a constrain in improving something that may be a constrain.
You can constrain the part instance to be fixed in space, or you can constrain it to follow selected nodes.
To constrain or not to constrain, and other stories of intensive upper extremity training for children with unilateral cerebral palsy.