Strong's Exhaustive Concordance: Hebrew and Chaldee Dictionary:
"1961. hayah ... to exist, i.e. be or become, come to pass."
"8414. tohuw ... to lie waste; a desolation (of surface)."
Genesis 1:1 In the beginning God created the heaven and the earth.
2 And the earth was [or became see Gen. 2:7; Strong's: hayah] without form [Strong's: tohuw], and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters.
[Genesis 2:7 And the LORD God formed man of the dust of the ground, and breathed into his nostrils the breath of life; and man became [Strong's: hayah] a living soul.]
Isaiah 45:18 For thus saith the LORD that created the heavens; God himself that formed the earth and made it; he hath established it, he created it not in vain [Strong's: tohuw] [RSV: he did not create a chaos], he formed it to be inhabited: I am the LORD; and there is none else.
Topical Bible Studies > God > This Study