Strong's #1288: barak (pronounced baw-rak')
 a primitive root; to kneel; by implication to bless God (as an act of adoration), and (vice-versa) man (as a benefit); also (by euphemism) to curse (God or the king, as treason):--X abundantly, X altogether, X at all, blaspheme, bless, congratulate, curse, X greatly, X indeed, kneel (down), praise, salute, X still, thank.
Brown-Driver-Briggs Hebrew Lexicon:
 ּ 
  bârak 
 
 1) to bless, kneel
 
 1a) (Qal)
 
 1a1) to kneel
 1a2) to bless
 
 1b) (Niphal) to be blessed, bless oneself
 1c) (Piel) to bless
 1d) (Pual) to be blessed, be adored
 1e) (Hiphil) to cause to kneel
 1f) (Hithpael) to bless oneself
 
 2) (TWOT) to praise, salute, curse
 
  Part of Speech: verb
Relation: a primitive root
Usage:
This word is used 330 times:
Genesis 1:22: "And God  blessed them, saying, Be fruitful, and multiply, and fill the waters"
Genesis 1:28: "And God  blessed them, and God said unto them, Be fruitful, and multiply, and replenish"
Genesis 2:3: "And God  blessed the seventh day, and sanctified it: because that in it he had rested"
Genesis 5:2: "Male created  he them; and blessed them, and called their name Adam,"
Genesis 9:1: "And God  blessed Noah and his sons, and said unto them, Be fruitful, and multiply,"
Genesis 9:26: "And he said,  Blessed be the LORD God of Shem; and Canaan shall be his servant."
Genesis 12:2: "And I will make nation,  and I will bless thee, and make thy name great; and thou shalt be a blessing:"
Genesis 12:3: " And I will bless thee, and curse him that curseth thee: and in thee shall all families of the earth be blessed."
Genesis 12:3: "And I will bless  them that bless thee, and curse him that curseth thee: and in thee shall all families of the earth be blessed."
Genesis 12:3: "thee: and in thee shall all families of the earth  be blessed."
Genesis 14:19: " And he blessed Blessed be Abram of the most high God, possessor of heaven"
Genesis 14:19: "And he blessed  Blessed be Abram of the most high God, possessor of heaven"
Genesis 14:20: " And blessed God, which hath delivered thine enemies into thy hand. And he gave"
Genesis 17:16: " And I will bless thee a son also of her: yea, I will bless her, and she shall be a mother of nations;"
Genesis 17:16: "thee a son also of  her: yea, I will bless her, and she shall be a mother of nations; kings of people"
Genesis 17:20: "And as for Ishmael, thee: Behold,  I have blessed him, and will make him fruitful, and will multiply him exceedingly;"
Genesis 18:18: "nation, and all the nations of the earth  shall be blessed"
Genesis 22:17: "That  in blessing I will bless thee, and in multiplying I will multiply thy seed as the stars"
Genesis 22:17: "That  I will bless thee, and in multiplying I will multiply thy seed as the stars"
Genesis 22:18: "the nations of the earth  be blessed; because thou hast obeyed my voice."
Genesis 24:1: "and well stricken in age: and the LORD  had blessed Abraham in all things."
Genesis 24:11: "And he made his camels  to kneel down without the city by a well of water"
Genesis 24:27: "And he said,  Blessed be the LORD God of my master Abraham, who hath not"
Genesis 24:31: "And he said,  thou blessed of the LORD; wherefore standest thou without? for I"
Genesis 24:35: "And the LORD  hath blessed my master greatly; and he is become great: and he hath given him flocks,"
Genesis 24:48: "And I bowed down my head, the LORD,  and blessed the LORD God of my master"
Genesis 24:60: " And they blessed Rebekah, and said unto her, Thou art our sister, be thou the mother of thousands"
Genesis 25:11: "the death of Abraham, that God  blessed his son Isaac; and Isaac"
Genesis 26:3: "land, and I will be with  thee, and will bless thee; for unto thee, and unto thy seed, I will give"
Genesis 26:4: "shall all the nations of the earth  be blessed;"
Genesis 26:12: "year a hundredfold: and the LORD  blessed"
Genesis 26:24: "for I am with  thee, and will bless thee, and multiply thy seed for"
Genesis 26:29: "in peace: thou art now  the blessed of the LORD."
Genesis 27:4: "it to me, that I may eat; that my soul  may bless thee before I die."
Genesis 27:7: "and make me savory meat, that I may eat,  and bless thee before the LORD before my death."
Genesis 27:10: "that he may eat, and that  he may bless thee before his death."
Genesis 27:19: "and eat of my venison, that thy soul  may bless"
Genesis 27:23: "as his brother Esau's hands:  so he blessed"
Genesis 27:25: "venison, that my soul  may bless thee. And he brought it near to him, and he did eat: and he brought"
Genesis 27:27: "the smell of his raiment,  and blessed him, and said, See, the smell of my son"
Genesis 27:27: "of a field which the LORD  hath blessed:"
Genesis 27:29: "bow down to thee: cursed be every one that curseth  thee, and blessed be he that blesseth"
Genesis 27:29: "to thee: cursed be every one that curseth thee, and blessed  be he that blesseth"
Genesis 27:30: "Isaac had made an end  of blessing Jacob, and Jacob was"
Genesis 27:31: "venison, that thy soul  may bless"
Genesis 27:33: "venison, and brought it me, and I have eaten of all before thou camest,  and have blessed"
Genesis 27:33: "of all before thou camest, and have blessed him? yea, and he shall be  blessed."
Genesis 27:34: "cry, and said unto his father,  Bless me, even me also, O my father."
Genesis 27:38: "Hast thou but one blessing, my father?  bless me, even me also, O my father. And Esau"
Genesis 27:41: "the blessing wherewith his father  blessed him: and Esau said in his heart, The days"