כִּיkîy

1. that

a. prefixed to sentences depending on an active verb, and occupying to it the place of an accusative (Genesis 1:10; Genesis 3:6; Genesis 6:2)

b. often introduces the direct narration (Luke 4:21; Genesis 21:30; Genesis 29:33)

c. especially after an oath, introducing the fact sworn to (Genesis 42:16; Numbers 14:22; 1 Samuel 20:3)

d. Rare otherwise, used sometimes with adverbs and interjections to add force or distinctness to the affirmation which follows (2 Samuel 9:1; Genesis 29:15; Job 6:22)

e. yea, surely, certainly, there seem also to be other cases in which כִּי, standing alone, has an intensive force, introducing a statement with emphasis (Exodus 18:11; Numbers 23:23; 1 Samuel 17:25)

f. that, expressing consecution, especially after a question implying surprise or deprecation (Genesis 20:9; 1 Samuel 22:8; Isaiah 22:1)

g. added to prepositions כִּי converts them, like אֲשֶׁר, into conjunctions

2.

a. when, Of time (Genesis 6:1; Genesis 26:8; Genesis 27:1)

b. when, elsewhere כִּי has a force approximating to if, though it usually represents a case as more likely to occur than אִם (Genesis 38:16; Numbers 5:20; Numbers 10:32)

c. when or if, with a concessive force, i.e. though (Jeremiah 4:30; Jeremiah 14:12; Jeremiah 49:16)

3. Because, since (Isaiah 28:15; Genesis 27:20; Exodus 1:19)

a. because (Genesis 3:14; Genesis 3:17; Genesis 18:20)

b. because, for (Genesis 2:3; Genesis 4:25; Genesis 2:5)

c. For (Isaiah 3:8; Job 6:21; Job 6:15-20)

d. for (Genesis 3:19; Genesis 26:7; Genesis 43:32)

e. for, but (Genesis 17:15; Genesis 24:3; Genesis 45:8)

1. each particle retaining its independent force, and relating to a different clause

a. that if (Jeremiah 26:15; 1 Samuel 14:39; Jeremiah 22:24)

b. for if, for though (Exodus 8:17; Exodus 9:2; Exodus 10:4)

2. the two particles being closely conjoined, and relating to the same clause

a. except, limiting the preceding clause (Genesis 32:27; Leviticus 22:6; Isaiah 65:6)

b. but rather, but, the if being neglected, and treated as pleonastic (compare אִם 1.c.), so that the clause is no longer a limitation of the preceding clause but a contradiction of it, (= a slightly strengthened כִּי) (Genesis 15:4; 1 Kings 8:19; 1 Kings 32:29)

c. though I have filled thee with men, after an oath כִּי אִם appears to = a strengthened כִּי, introducing the fact sworn to (2 Kings 5:20; Jeremiah 51:14; 2 Samuel 15:21)

כִּי עַל כֵּן: forasmuch as, literally for therefore, emphasizing the ground pleonastically (Genesis 18:5; Genesis 19:8; Genesis 33:10; Genesis 38:26; Numbers 10:31)