נָכֹחַnâkôach

straight, right, straightness (Isaiah 57:2; Isaiah 33:15; Isaiah 50:10; Proverbs 4:25; Amos 3:10)

Pronunciation: naw-ko'-akh · Hebrew/Aramaic (Old Testament) · H5228

Same root

נֵכַחnêkach · H5226properly, the fore part; used adverbially, opposite
נְכֹחָהnᵉkôchâh · H5229properly, straightforwardness, i.e. (figuratively) integrity, or (concretely) a truth

Where it appears

Appears 4 times in the Bible.

2 Samuel 15:3 Then Absalom would say, “You’ve really got a strong case here! It’s too bad the king doesn’t have anyone to hear it.
Proverbs 8:9 My words are plain to anyone with understanding, clear to those with knowledge.
Proverbs 24:26 An honest answer is like a kiss of friendship.
Isaiah 57:2 For those who follow godly paths will rest in peace when they die.

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).