Bible: Charged Straitly

Repeated words found across different books in the Bible (KJV):
1Sm 14:28
Then answered one of the people, and said, Thy father straitly charged the people with an oath, saying, Cursed be the man that eateth any food this day. And the people were faint.

Mat 9:30
And their eyes were opened; and Jesus straitly charged them, saying, See that no man know it.

Mark 1:43
And he straitly charged him, and forthwith sent him away;

Mark 3:12
And he straitly charged them that they should not make him known.

Mark 5:43
And he charged them straitly that no man should know it; and commanded that something should be given her to eat.

Luke 9:21
And he straitly charged them, and commanded them to tell no man that thing;