One way to verify this without even going to an old English dictionary or even going back to the Hebrew word is to compare the word as used in the very same KJV Bible and see how the word is used and even without knowing what the word means we can INFER what it means from the CONTEXT of the sentences it is used within.
For example take the word as used in
Genesis 15:1
After these things the word of the Lord came unto Abram in a vision, saying, Fear not, Abram : I am thy shield, and thy exceeding great reward.
Here it can be seen the YHWH is promising Abraham that he will protect him and be his shield and thus Abraham need not "fear".
What can be the meaning of this word in the context other than being afraid of danger?
Again let's look at
Genesis 19:30
And Lot went up out of Zoar, and dwelt in the mountain, and his two daughters with him ; for he feared to dwell in Zoar : and he dwelt in a cave, he and his two daughters.
What possible meaning could the word "feared" have here other than to be afraid because of possible harm or loss?
Also in
Genesis 21:17
And God heard the voice of the lad ; and the angel of God called to Hagar out of heaven, and said unto her, What aileth thee, Hagar? fear not ; for God hath heard the voice of the lad where he is.
I think it is very clear that the word "fear" here is also used to mean being afraid of harm and danger.
Also
Genesis 26:7
And the men of the place asked him of his wife ; and he said, She is my sister : for he feared to say, She is my wife ; lest, said he, the men of the place should kill me for Rebekah ; because she was fair to look upon.
What other meaning is there than worrying about harm and injury (“kill me”)?
In all the above cases the Hebrew word used in the Tanakh is (yara) ירא which is “Fear”.
Finally let's see
Deuteronomy 21:21
And all the men of his city shall stone him with stones, that he die; so shalt thou put away the evil from the midst of thee; and all Israel shall hear, and fear.
Again the Hebrew word used is ירא which is translated as "fear".
What other meaning is to be inferred hear other than dread of a punishment for being an unruly son who will incur the wrath of god and will therefore be stoned to death?
Now let's look at a case that might be whitewashed by casuists but that is quite obvious even within the very same verse.... look at
Exodus 20:18-20
20:18 And all the people saw the thunderings, and the lightnings, and the noise of the trumpet, and the mountain smoking: and when the people saw it, they removed, and stood afar off.
20:19 And they said unto Moses, Speak thou with us, and we will hear: but let not God speak with us, lest we die.
20:20 And Moses said unto the people, Fear not: for God is come to prove you, and that his fear may be before your faces, that ye sin not.
A casuist might try to explain the word "fear" in the phrase "his
fear may be before your faces, that ye sin not" as respect or awe or love or some other claptrap apologetic .... or even that the word meant something else in old English or some other contortions of semantics.
But here we have in the very same verse the word "fear" used twice and in the Hebrew it is the very same word ירא as used in other verses where the word cannot be explained away as anything other than the worry about a threat of danger or something likely to cause harm or pain.
It is even expressly said "lest we die". The people are afraid for their lives and Moses says to them "fear not" FOR NOW because he is only showing you so that you will "fear" him later if you think about sinning.
I think it is quite clear that the word “fear” in the English of the KJV Bible means
an unpleasant emotion caused by the belief that someone or something is dangerous, likely to cause pain, or a threat
Much like it means today and all this “fear” of god is meant to be exactly what it says.
Deuteronomy 6:25
6:13 Thou shalt fear the LORD thy God, and serve him, and shalt swear by his name.
6:14 Ye shall not go after other gods, of the gods of the people which are round about you;
6:15 (For the LORD thy God is a jealous God among you) lest the anger of the LORD thy God be kindled against thee, and destroy thee from off the face of the earth.
Exodus 23:27
23:27 I will send my fear before thee, and will destroy all the people to whom thou shalt come, and I will make all thine enemies turn their backs unto thee.
Deuteronomy 2:25
This day will I begin to put the dread of thee and the fear of thee upon the nations that are under the whole heaven, who shall hear report of thee, and shall tremble, and be in anguish because of thee.