ريب

Verbal noun of رَابَ‎ (rāba, “to raise suspicions”)

رَيْب • (rayb) m

1. doubt, suspicion, uncertainty
   • 7th century CE, 'The Quran'‎:

     ‏ذَٰلِكَ ٱلْكِتَابُ لَا رَيْبَ فِيهِ‎

     ḏālika l-kitābu lā rayba fīhi

     This is the Scripture whereof there is no doubt.

2. verbal noun of رَابَ‎ (rāba) (form I)

• شَكّ‎ (šakk)