Eccl. 8:7 KJV (With Strong’s)

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7
For he knoweth
yada` (Hebrew #3045)
to know (properly, to ascertain by seeing); used in a great variety of senses, figuratively, literally, euphemistically and inferentially (including observation, care, recognition; and causatively, instruction, designation, punishment, etc.) (as follow)
KJV usage: acknowledge, acquaintance(-ted with), advise, answer, appoint, assuredly, be aware, (un-)awares, can(-not), certainly, comprehend, consider, X could they, cunning, declare, be diligent, (can, cause to) discern, discover, endued with, familiar friend, famous, feel, can have, be (ig-)norant, instruct, kinsfolk, kinsman, (cause to let, make) know, (come to give, have, take) knowledge, have (knowledge), (be, make, make to be, make self) known, + be learned, + lie by man, mark, perceive, privy to, X prognosticator, regard, have respect, skilful, shew, can (man of) skill, be sure, of a surety, teach, (can) tell, understand, have (understanding), X will be, wist, wit, wot.
Pronounce: yaw-dah'
Origin: a primitive root
not that which shall be: for who can tell
nagad (Hebrew #5046)
properly, to front, i.e. stand boldly out opposite; by implication (causatively), to manifest; figuratively, to announce (always by word of mouth to one present); specifically, to expose, predict, explain, praise
KJV usage: bewray, X certainly, certify, declare(-ing), denounce, expound, X fully, messenger, plainly, profess, rehearse, report, shew (forth), speak, X surely, tell, utter.
Pronounce: naw-gad'
Origin: a primitive root
him νwhen it shall be?
ν
how.

Cross References

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he knoweth.
Eccl. 6:12• 12For who knoweth what is good for man in this life, all the days of his vain life which he spendeth as a shadow? for who can tell a man what shall be after him under the sun? (Eccl. 6:12)
;
Eccl. 9:12• 12For man also knoweth not his time: as the fishes that are taken in an evil net, and as the birds that are caught in the snare; so are the sons of men snared in an evil time, when it falleth suddenly upon them. (Eccl. 9:12)
;
Eccl. 10:14• 14A fool also is full of words: a man cannot tell what shall be; and what shall be after him, who can tell him? (Eccl. 10:14)
;
Prov. 24:22• 22For their calamity shall rise suddenly; and who knoweth the ruin of them both? (Prov. 24:22)
;
Prov. 29:1• 1He, that being often reproved hardeneth his neck, shall suddenly be destroyed, and that without remedy. (Prov. 29:1)
;
Matt. 24:44,50• 44Therefore be ye also ready: for in such an hour as ye think not the Son of man cometh.
50The lord of that servant shall come in a day when he looketh not for him, and in an hour that he is not aware of,
(Matt. 24:44,50)
;
Matt. 25:6‑13• 6And at midnight there was a cry made, Behold, the bridegroom cometh; go ye out to meet him.
7Then all those virgins arose, and trimmed their lamps.
8And the foolish said unto the wise, Give us of your oil; for our lamps are gone out.
9But the wise answered, saying, Not so; lest there be not enough for us and you: but go ye rather to them that sell, and buy for yourselves.
10And while they went to buy, the bridegroom came; and they that were ready went in with him to the marriage: and the door was shut.
11Afterward came also the other virgins, saying, Lord, Lord, open to us.
12But he answered and said, Verily I say unto you, I know you not.
13Watch therefore, for ye know neither the day nor the hour wherein the Son of man cometh.
(Matt. 25:6‑13)
;
1 Thess. 5:1‑3• 1But of the times and the seasons, brethren, ye have no need that I write unto you.
2For yourselves know perfectly that the day of the Lord so cometh as a thief in the night.
3For when they shall say, Peace and safety; then sudden destruction cometh upon them, as travail upon a woman with child; and they shall not escape.
(1 Thess. 5:1‑3)
when.
or, how.

J. N. Darby Translation

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7
for he knoweth not that which shall be; for who can tell him how it shall be?