'Declare' in the Bible

Every man's work shall be made manifest: for the day shall declare it, because it shall be revealed by fire; and the fire shall try every man's work of what sort it is.

But I say to the unmarried and to the widows, [that as a practical matter] it is good if they remain [single and entirely devoted to the Lord] as I am.

To the rest I declare—I, not the Lord [since Jesus did not discuss this]—that if any [believing] brother has a wife who does not believe [in Christ], and she consents to live with him, he must not leave her.

Now in this that I declare unto you I praise you not, that ye come together not for the better, but for the worse.

Moreover, brethren, I declare unto you the gospel which I preached unto you, which also ye have received, and wherein ye stand;