'Strengthened' in the Bible

Solomon the son of David established himself securely over his kingdom, and the Lord his God was with him and made him exceedingly great.

So they strengthened the kingdom of Judah and supported Rehoboam the son of Solomon for three years; for they walked in the way of David and Solomon for three years.

When the kingdom of Rehoboam was established and strong, he and all Israel with him abandoned the law of the Lord.

So King Rehoboam established himself in Jerusalem and reigned. Rehoboam was forty-one years old when he began to reign, and he reigned seventeen years in Jerusalem, the city in which the Lord had chosen from all the tribes of Israel to put His Name. And his mother was Naamah the Ammonitess.

and worthless (unprincipled, unethical) men gathered around him, useless and wicked men, who proved too strong for Rehoboam the son of Solomon when Rehoboam was young and timid, and could not assert himself against them.

Jehoshaphat his son then became king [of Judah] in Asa’s place, and strengthened his position over Israel.

When Jehoram had ascended over the kingdom of his father and made himself secure, he killed all his brothers with the sword [to eliminate any rivals], and some of the leaders of Israel as well.

So the workmen labored, and the repair work progressed in their hands; and they restored and organized the house of God in accordance with its specifications and strengthened it.

Also Hezekiah resolutely set to work and rebuilt all the wall that had been broken down, and erected towers on it, and he built another wall outside and strengthened the Millo (fortification) in the City of David, and made a great number of weapons and shields.