Of course not. No English words are in the Bible.
But harag the Hebrew word is in the Bible, and it appears many times in different forms. One is specifically "murders".
In fact to further "harag" your argument here is one instance:
8 He sits in ambush in the villages; in hiding places he murders the innocent. His eyes stealthily watch for the hapless,
9 he lurks in secret like a lion in his covert; he lurks that he may seize the poor, he seizes the poor when he draws him into his net.
10 The hapless is crushed, sinks down, and falls by his might.
11 He thinks in his heart, "God has forgotten, he has hidden his face, he will never see it."
12 Arise, O LORD; O God, lift up thy hand; forget not the afflicted.
Ironically, the verse I happened upon is fitting for this thread.
I suppose it could be said to be a unsanctioned killing since permissions would have been needed for killings that did not meet the proper killing etiquette of the time, (if there was any).
But I thought "murder" was a bit of a stretch. As it comes from English law.