Past verb
Present verb
Idiomatic meaning
بَلَغَ
يَبْلُغُ
he reached / he reaches
جَهَدَ
يَجْهَدُ
he strove / he strives
نَفَعَ
يَنْفَعُ
he brought benefit / he brings benefit
نَظَرَ
يَنْظُرُ
he looked / he looks
نَزَلَ
يَنْزِلُ
he descended / he descends
بَلَغَ describes reaching a destination, while نَزَلَ describes coming down or descending. Keep the direction of each action clear.