'Understand' in the Bible

Also, all [the people of] that generation were gathered to their fathers [in death]; and another generation arose after them who did not know (recognize, understand) the Lord, nor even the work which He had done for Israel.

So Jephthah said to the elders of Gilead, “If you take me back [home] to fight against the Ammonites and the Lord gives them over to me, will I [really] become your head?”