Strong's #7385: riyq (pronounced reek)
from 7324; emptiness; figuratively, a worthless thing; adverbially, in vain:--empty, to no purpose, (in) vain (thing), vanity.
Brown-Driver-Briggs Hebrew Lexicon:
1) emptiness, vanity, empty, idle, vain
Part of Speech: noun masculine
Relation: from H7324
This word is used 12 times:
Leviticus 26:16: "of heart: and ye shall sow your seed in vain, for your enemies shall eat"
Leviticus 26:20: "And your strength shall be spent in vain: for your land shall not yield her increase,"
Job 39:16: "against her young ones, as though they were not hers: her labor is in vain without fear;"
Psalms 2:1: "rage, and the people imagine a vain thing?"
Psalms 4:2: "how long will ye turn my glory into shame? how long will ye love vanity, and seek after leasing? Selah."
Psalms 73:13: "Verily I have cleansed my heart in vain, and washed my hands in innocency."
Isaiah 30:7: "For the Egyptians shall help in vain, and to no purpose: therefore have I cried concerning this, Their strength"
Isaiah 49:4: "Then I said, I have labored in vain, I have spent my strength for naught, and in vain:"
Isaiah 65:23: "They shall not labor in vain, nor bring forth for trouble; for they"
Jeremiah 51:34: "hath devoured me, he hath crushed me, he hath made me an empty vessel, he hath swallowed me up like a dragon, he hath filled"
Jeremiah 51:58: "shall be burned with fire; and the people shall labor in vain, and the folk in the fire, and they shall be weary."
Habakkuk 2:13: "fire, and the people shall weary themselves for very vanity?"