شُكْر
shukr
gratitude; thankfulness
شـكـر
Most Arabic words are built from a small set of root letters — knowing the root helps you recognize related words across the dictionary.
لَئِن شَكَرْتُمْ لَأَزِيدَنَّكُمْ
If you are grateful, I will surely increase you (Quran 14:7)