'Proper' in the Bible

And just as they did not see fit to acknowledge God any longer, God gave them over to a depraved mind, to do those things which are not proper,

For [while] we were still helpless, yet at the proper time Christ died for the ungodly.

Do not be conformed to this world, but continuously be transformed by the renewing of your minds so that you may be able to determine what God's will is what is proper, pleasing, and perfect.

Never repay anyone evil for evil. Take thought for what is right and gracious and proper in the sight of everyone.