Root ر ق ب(r q b) has 13 unique word forms and appears 24 times in the Quran.

English gloss Guard, Greed, Fear of God, Neck, Slave

Word Translation Occurrences
رَقَبَةٖ (of) a believing slave, (of) a slave 8
ٱلرِّقَابِ freeing the necks (slaves), the necks, the (freeing of) the necks 6
فَٱرۡتَقِبۡ So watch, Then watch 4
رَقِيبٌ (is) an observer 2
رَقِيبٞ a watcher 2
رَقِيبٗا Ever-Watchful 2
رَّقِيبٗا an Observer 2
فَٱرۡتَقِبۡهُمۡ so watch them 2
ٱلرَّقِيبَ the Watcher 2
مُّرۡتَقِبُونَ (too are) watching 2
وَٱرۡتَقِبُوٓاْ And watch 2
يَتَرَقَّبُ (and) was vigilant 2
يَتَرَقَّبُۖ (and) vigilant 2
يَرۡقُبُواْ they do not regard (the ties) 2
تَرۡقُبۡ you respect 2
يَرۡقُبُونَ they respect (the ties) 2
رَقَبَةٍ a neck 2
رَقَبَةٖۖ a slave 2